Search Results: "olek"

12 April 2020

Enrico Zini: Some inventors links

Cleopatra the Alchemist - Wikipedia
history people archive.org
Cleopatra the Alchemist who likely lived during the 3rd century AD, was a Greek alchemist, author, and philosopher. She experimented with practical alchemy but is also credited as one of the four female alchemists that could produce the Philosopher's stone. Some writers consider her to be the inventor of the alembic, a distillation apparatus.
Hedy Lamarr (/ he di/), born Hedwig Eva Maria Kiesler (November 9, 1914[a] January 19, 2000), was an Austrian-born American film actress and inventor who was posthumously inducted into the National Inventors Hall of Fame.[1]
Radia Joy Perlman (born December 18, 1951) is an American computer programmer and network engineer. She is most famous for her invention of the spanning-tree protocol (STP), which is fundamental to the operation of network bridges, while working for Digital Equipment Corporation. She also made large contributions to many other areas of network design and standardization, such as link-state routing protocols.
Stephanie Louise Kwolek (July 31, 1923 June 18, 2014) was an American chemist who is known for inventing Kevlar. She was of Polish heritage and her career at the DuPont company spanned more than 40 years.[1] She discovered the first of a family of synthetic fibres of exceptional strength and stiffness: poly-paraphenylene terephthalamide.
This page aims to list inventions and discoveries in which women played a major role.

7 October 2016

Petter Reinholdtsen: Isenkram, Appstream and udev make life as a LEGO builder easier

The Isenkram system provide a practical and easy way to figure out which packages support the hardware in a given machine. The command line tool isenkram-lookup and the tasksel options provide a convenient way to list and install packages relevant for the current hardware during system installation, both user space packages and firmware packages. The GUI background daemon on the other hand provide a pop-up proposing to install packages when a new dongle is inserted while using the computer. For example, if you plug in a smart card reader, the system will ask if you want to install pcscd if that package isn't already installed, and if you plug in a USB video camera the system will ask if you want to install cheese if cheese is currently missing. This already work just fine. But Isenkram depend on a database mapping from hardware IDs to package names. When I started no such database existed in Debian, so I made my own data set and included it with the isenkram package and made isenkram fetch the latest version of this database from git using http. This way the isenkram users would get updated package proposals as soon as I learned more about hardware related packages. The hardware is identified using modalias strings. The modalias design is from the Linux kernel where most hardware descriptors are made available as a strings that can be matched using filename style globbing. It handle USB, PCI, DMI and a lot of other hardware related identifiers. The downside to the Isenkram specific database is that there is no information about relevant distribution / Debian version, making isenkram propose obsolete packages too. But along came AppStream, a cross distribution mechanism to store and collect metadata about software packages. When I heard about the proposal, I contacted the people involved and suggested to add a hardware matching rule using modalias strings in the specification, to be able to use AppStream for mapping hardware to packages. This idea was accepted and AppStream is now a great way for a package to announce the hardware it support in a distribution neutral way. I wrote a recipe on how to add such meta-information in a blog post last December. If you have a hardware related package in Debian, please announce the relevant hardware IDs using AppStream. In Debian, almost all packages that can talk to a LEGO Mindestorms RCX or NXT unit, announce this support using AppStream. The effect is that when you insert such LEGO robot controller into your Debian machine, Isenkram will propose to install the packages needed to get it working. The intention is that this should allow the local user to start programming his robot controller right away without having to guess what packages to use or which permissions to fix. But when I sat down with my son the other day to program our NXT unit using his Debian Stretch computer, I discovered something annoying. The local console user (ie my son) did not get access to the USB device for programming the unit. This used to work, but no longer in Jessie and Stretch. After some investigation and asking around on #debian-devel, I discovered that this was because udev had changed the mechanism used to grant access to local devices. The ConsoleKit mechanism from /lib/udev/rules.d/70-udev-acl.rules no longer applied, because LDAP users no longer was added to the plugdev group during login. Michael Biebl told me that this method was obsolete and the new method used ACLs instead. This was good news, as the plugdev mechanism is a mess when using a remote user directory like LDAP. Using ACLs would make sure a user lost device access when she logged out, even if the user left behind a background process which would retain the plugdev membership with the ConsoleKit setup. Armed with this knowledge I moved on to fix the access problem for the LEGO Mindstorms related packages. The new system uses a udev tag, 'uaccess'. It can either be applied directly for a device, or is applied in /lib/udev/rules.d/70-uaccess.rules for classes of devices. As the LEGO Mindstorms udev rules did not have a class, I decided to add the tag directly in the udev rules files included in the packages. Here is one example. For the nqc C compiler for the RCX, the /lib/udev/rules.d/60-nqc.rules file now look like this:
SUBSYSTEM=="usb", ACTION=="add", ATTR idVendor =="0694", ATTR idProduct =="0001", \
    SYMLINK+="rcx-%k", TAG+="uaccess"
The key part is the 'TAG+="uaccess"' at the end. I suspect all packages using plugdev in their /lib/udev/rules.d/ files should be changed to use this tag (either directly or indirectly via 70-uaccess.rules). Perhaps a lintian check should be created to detect this? I've been unable to find good documentation on the uaccess feature. It is unclear to me if the uaccess tag is an internal implementation detail like the udev-acl tag used by /lib/udev/rules.d/70-udev-acl.rules. If it is, I guess the indirect method is the preferred way. Michael asked for more documentation from the systemd project and I hope it will make this clearer. For now I use the generic classes when they exist and is already handled by 70-uaccess.rules, and add the tag directly if no such class exist. To learn more about the isenkram system, please check out my blog posts tagged isenkram. To help out making life for LEGO constructors in Debian easier, please join us on our IRC channel #debian-lego and join the Debian LEGO team in the Alioth project we created yesterday. A mailing list is not yet created, but we are working on it. :) As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address 15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b.

3 September 2016

Bits from Debian: New Debian Developers and Maintainers (July and August 2016)

The following contributors got their Debian Developer accounts in the last two months: The following contributors were added as Debian Maintainers in the last two months: Congratulations!

10 February 2015

Enrico Zini: systemd-default-rescue

seat-inspect Four months ago I wrote this somewhere:
Seeing a DD saying "this new dbus stuff scares me" would make most debian users scared. Seeing a DD who has an idea of what is going on, and who can explain it, would be an interesting and exciting experience. So, let's be exemplary, competent and patient. Or at least, competent. Some may like or not like the changes, but do we all understand what is going on? Will we all be able to support our friends and customers running jessie? I confess that although I understand the need for it, I don't feel competent enough to support systemd-based machines right now. So, are we maybe in need of help, cheat sheets, arsenals of one-liners, diagnostic tools? Maybe a round of posts on -planet like "one debian package a day" but with new features that jessie will have, and how to understand them and take advantage of them?
That was four months ago. In the meantime, I did some work, and it got better for me. Yesterday, however, I've seen an experienced Linux person frustrated because the shutdown function of the desktop was doing nothing whatsoever. Today I found John Goerzen's post on planet. I felt like some more diagnostic tools were needed, so I spent the day making seat-inspect. seat-inspect tries to make the status of the login/seat system visible, to help with understanding and troubleshooting. The intent of running the code is to have an overview of the system status, both to see what the new facilities are about, and to figure out if there is something out of place. The intent of reading the code is to have an idea of how to use these facilities: the code has been written to be straightforward and is annotated with relevant bits from the logind API documentation. seat-inspect is not a finished tool, but a starting point. I put it on github hoping that people will fork it and add their own extra sanity checks and warnings, so that it can grow into a standard thing to run if a system acts weird. As it is now, it should be able to issue warnings if some bits are missing for network-manager or shutdown functions to work correctly. I haven't really tested that, though, because I don't have a system at hand where they are currently not working fine. Another nice thing of it is that when running seat-inspect -v you get a dump of what logind/consolekit think about your system. I found it an interesting way to explore the new functionalities that we recently grew. The same can be done, and in more details, with loginctl calls, but I lacked a summary. After writing this I feel a bit more competent, probably enough to sit at somebody's computer and poke into loginctl bits. I highly recommend the experience.

12 January 2015

Russell Coker: Systemd Notes

A few months ago I gave a lecture about systemd for the Linux Users of Victoria. Here are some of my notes reformatted as a blog post: Scripts in /etc/init.d can still be used, they work the same way as they do under sysvinit for the user. You type the same commands to start and stop daemons. To get a result similar to changing runlevel use the systemctl isolate command. Runlevels were never really supported in Debian (unlike Red Hat where they were used for starting and stopping the X server) so for Debian users there s no change here. The command systemctl with no params shows a list of loaded services and highlights failed units. The command journalctl -u UNIT-PATTERN shows journal entries for the unit(s) in question. The pattern uses wildcards not regexs. The systemd journal includes the stdout and stderr of all daemons. This solves the problem of daemons that don t log all errors to syslog and leave the sysadmin wondering why they don t work. The command systemctl status UNIT gives the status and last log entries for the unit in question. A program can use ioctl(fd, TIOCSTI, ) to push characters into a tty buffer. If the sysadmin runs an untrusted program with the same controlling tty then it can cause the sysadmin shell to run hostile commands. The system call setsid() to create a new terminal session is one solution but managing which daemons can be started with it is difficult. The way that systemd manages start/stop of all daemons solves this. I am glad to be rid of the run_init program we used to use on SE Linux systems to deal with this. Systemd has a mechanism to ask for passwords for SSL keys and encrypted filesystems etc. There have been problems with that in the past but I think they are all fixed now. While there is some difficulty during development the end result of having one consistent way of managing this will be better than having multiple daemons doing it in different ways. The commands systemctl enable and systemctl disable enable/disable daemon start at boot which is easier than the SysVinit alternative of update-rc.d in Debian. Systemd has built in seat management, which is not more complex than consolekit which it replaces. Consolekit was installed automatically without controversy so I don t think there should be controversy about systemd replacing consolekit. Systemd improves performance by parallel start and autofs style fsck. The command systemd-cgtop shows resource use for cgroups it creates. The command systemd-analyze blame shows what delayed the boot process and
systemd-analyze critical-chain shows the critical path in boot delays. Sysremd also has security features such as service private /tmp and restricting service access to directory trees. Conclusion For basic use things just work, you don t need to learn anything new to use systemd. It provides significant benefits for boot speed and potentially security. It doesn t seem more complex than other alternative solutions to the same problems. https://wiki.debian.org/systemd http://freedesktop.org/wiki/Software/systemd/Optimizations/ http://0pointer.de/blog/projects/security.html

10 January 2015

Mike Gabriel: Shifting my Focus in X2Go

Dear X2Go Community, dear friends, as many of you may know, I have been contributing a considerable amount
of time to upstream-maintaining X2Go over the past 4 years. I provided
new X2Go components (Python X2Go, PyHoca X2Go Client, a publicly
available X2Go Session Broker, X2Go MATE Bindings, etc.) and focused on
making X2Go a wide-spread community project. For the last 2-3 years I
have been in the role of the X2Go project coordinator and various other
roles. With the beginning of 2015, I will pass on several of those roles to
other people in the project, see the below list for already assigned and
unassigned roles: The reasons for tremendously reducing my workload on X2Go are these: In several internal exchanges we (Heinz, Stefan, Mihai, Mike#2, read more

7 August 2014

Jordi Mallach: A pile of reasons why GNOME should be Debian jessie s default desktop environment

GNOME has, for some reason or another, always been the default desktop environment in Debian since the installer is able to install a full desktop environment by default. Release after release, Debian has been shipping different versions of GNOME, first based on the venerable 1.2/1.4 series, then moving to the time-based GNOME 2.x series, and finally to the newly designed 3.4 series for the last stable release, Debian 7 wheezy . During the final stages of wheezy s development, it was pointed out that the first install CD image would not longer hold all of the required packages to install a full GNOME desktop environment. There was lots of discussion surrounding this bug or fact, and there were two major reactions to it. The Debian GNOME team rebuilt some key packages so they would be compressed using xz instead of gzip, saving the few megabytes that were needed to squeeze everything in the first CD. In parallel, the tasksel maintainer decided switching to Xfce as default desktop was another obvious fix. This change, unannounced and two days before the freeze, was very contested and spurred the usual massive debian-devel threads. In the end, and after a few default desktop flip flops, it was agreed that GNOME would remain as the default for the already frozen wheezy release, and this issue would be revisited later on during jessie s development. And indeed, some months ago, Xfce was again reinstated as Debian s default desktop for jessie as announced:
Change default desktop to xfce.
This will be re-evaluated before jessie is frozen. The evaluation will
start around the point of DebConf (August 2014). If at that point gnome
looks like a better choice, it ll go back as the default.
Some criteria for that choice will include:
* Popcon numbers for gnome on jessie. If gnome installations continue to
  rise fast enough despite xfce being the default (compared with, say
  kde installations), then we ll know that users prefer gnome.
  Currently we have no data about how many users would choose gnome when
  it s not the default. Part of the reason for switching to xfce now
  is to get such data.
* The state of accessability support, particularly for the blind.
* How well the UI works for both new and existing users. Gnome 3
  seems to be adding back many gnome 2 features that existing users
  expect, as well as making some available via addons. If it feels
  comfortable to gnome 2 (and xfce) users, that would go a long way
  toward switching back to it as the default. Meanwhile, Gnome 3 is also
  breaking new ground in its interface; if the interface seems more
  welcoming to new users, or works better on mobile devices, etc, that
  would again point toward switching back.
* Whatever size constraints exist for CD or other images at the time.
--
Hello to all the tech journalists out there. This is pretty boring.
Why don t you write a story about monads instead?
Joey Hess in dfca406eb694e0ac00ea04b12fc912237e01c9b5.
Suffice to say that the Debian GNOME team participants have never been thrilled about how the whole issue is being handled, and we ve been wondering if we should be doing anything about it, or just move along and enjoy the smaller amount of bug reports against GNOME packages that this change would bring us, if it finally made it through to the final release. During our real life meet-ups in FOSDEM and the systemd+GNOME sprint in Antwerp, most members of the team did feel Debian would not be delivering a graphical environment with the polish we think our users deserve, and decided we at least should try to convince the rest of the Debian project and our users that Debian will be best suited by shipping GNOME 3.12 by default. Power users, of course, can and know how to get around this default and install KDE, Xfce, Cinnamon, MATE or whatever other choice they have. For the average user, though, we think we should be shipping GNOME by default, and tasksel should revert the above commit again. Some of our reasons are: In short, we think defaulting to GNOME is the best option for the Debian release, and in contrast, shipping Xfce as the default desktop could mean delivering a desktop experience that has some incomplete or rough edges, and not on par with Debian quality standards for a stable release. We believe tasksel should again revert the change and be uploaded as soon as possible, in order to get people testing images with GNOME the sooner the better, with the freeze only two months away. We would also like that in the future, changes of this nature will not be announced in a git commit log, but widely discussed in debian-project and the other usual development/decision channels, like the change of init system happened recently. We will, whichever the final decision is, continue to package GNOME with great care to ensure our users get the best possible desktop experience Debian can offer.

11 June 2014

Yves-Alexis Perez: Debian, Xfce, policykit and permissions

So, it seems that for a lot of people using unstable, hardware-related permissions (shutdown/reboot, suspend/hibernate, devices mount/umount etc.) have been broken since some times. That's usually the case for people using GNOME with lightdm display manager, Xfce with either gdm or lightdm. It seems that recently, policykit (which is used by GNOME and Xfce) switched from consolekit backend to logind backend (yeah, systemd-logind). So applications using policykit needs to handle that correctly, and that means beeing sure a logind session is correctly setup, which is done by installing the package libpam-systemd. For now, it's still possible to not switch to systemd as init system, by installing the systemd-shim package before libpam-systemd. Be aware that (at least with the current state of affairs), this is only true with logind before 204. When systemd maintainers start transitionning to a later version, only systemd-sysv (so, systemd as init system) will work. For people reluctant to switch to systemd, they can use systemd-shim for now. Then when systemd 205+ enters the archive, either lose those hardware permissions, or try to improve systemd-shim to handle that situation. There's not much we (Xfce/LightDM maintainers) can do about that.

28 May 2014

Tanguy Ortolo: GNU/Linux graphic sessions: allowing computer suspend and disabling a monitor

Allowing computer suspend Major desktop environments such as Xfce or KDE have a built-in computer suspend feature, but when you use a lighter alternative, things are a bit more complicated, because basically: only root can suspend the computer. Possible solutions include: With recent updates of the related Debian packages no idea of which one exactly the latter solution may not work any more, in which case it will only return the following error:
Error org.freedesktop.UPower.GeneralError: not authorized
It appears that this error is linked to ConsoleKit, a part of all this modern *Kit gizmo pile. If you are in this case, try prefixing your session launcher with the undocumented dark magic call ck-launch-session. For instance, this is what I have in my .xsession to launch my window manager i3:
exec ck-launch-session i3
Note: I do not know what ck-launch-session does exactly, why it is needed, and I do not want to know. To me, all that WhatsitKit pile is just some opaque, under-documented as in: no man page crap, that no one but their author really understand, designed to solve theoretical problems no one really cares about like: how to allow locally connected users to use the sound card while forbidding it to remote users while creating new issues such as this one. This stuff is too complex and under-documented for me to dive into it, so if it does not work out of the box, it is just some crap that gets in my way to using my computer as I wish. Disabling a monitor In some configurations, you have two monitors and want to disable one. For instance, in addition to my LCD monitor, I have a projector which I only use for movies. According to xorg.conf's man page, it can be disabled this way:
Section "Device"
    Identifier  "Internal graphic card"
    Option      "Monitor-DVI"   "LCD Monitor"
    Option      "Monitor-VGA"   "Projector"
EndSection
Section "Monitor"
    Identifier  "LCD Monitor"
EndSection
Section "Monitor"
    Identifier  "Projector"
    Option      "Enable"    "false"
EndSection
Except that does not work, because contrary to what the man page says the real option to use is not Enable but Disable! So here is the correct configuration to disable that monitor at start-up:
Section "Device"
    Identifier  "Internal graphic card"
    Option      "Monitor-DVI"   "LCD Monitor"
    Option      "Monitor-VGA"   "Projector"
EndSection
Section "Monitor"
    Identifier  "LCD Monitor"
EndSection
Section "Monitor"
    Identifier  "Projector"
    Option      "Disable"   "true"
EndSection
Note: yes, I will send a bug report with a patch against xorg.conf's man page.

13 April 2014

C.J. Adams-Collier: When was the last time you upgraded from squeeze to wheezy?

Wow. 3G delta. I haven t booted this laptop for a while I think I m finally ready to make the move from gnome2 to gnome3. There are bits that still annoy me, but I think it s off to a good start. Upgrading perl from 5.10 to 5.14.
cjac@calcifer:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be REMOVED:
  at-spi capplets-data compiz compiz-gnome compiz-gtk defoma deskbar-applet g++-4.3 gcc-4.3 gcj-4.4-base gcj-4.4-jre gcj-4.4-jre-headless gcj-4.4-jre-lib
  gdm3 gir1.0-clutter-1.0 gir1.0-freedesktop gir1.0-glib-2.0 gir1.0-gstreamer-0.10 gir1.0-gtk-2.0 gir1.0-json-glib-1.0 glade-gnome gnome-about
  gnome-accessibility gnome-applets gnome-core gnome-panel gnome-utils-common lib32readline5-dev libbrasero-media0 libclass-mop-perl libdb4.7-java
  libdb4.8-dev libdevhelp-1-1 libdigest-sha1-perl libdirectfb-dev libebook1.2-9 libecal1.2-7 libedata-book1.2-2 libedata-cal1.2-7 libedataserverui1.2-8
  libepc-1.0-2 libepc-ui-1.0-2 libept1 libgcj10 libgcj10-awt libgd2-noxpm libgstfarsight0.10-0 libgtkhtml-editor0 libjpeg62-dev libmetacity-private0
  libmono-accessibility1.0-cil libmono-bytefx0.7.6.1-cil libmono-cairo1.0-cil libmono-cil-dev libmono-corlib1.0-cil libmono-cscompmgd7.0-cil
  libmono-data-tds1.0-cil libmono-data1.0-cil libmono-debugger-soft0.0-cil libmono-getoptions1.0-cil libmono-i18n-west1.0-cil libmono-i18n1.0-cil
  libmono-ldap1.0-cil libmono-microsoft7.0-cil libmono-npgsql1.0-cil libmono-oracle1.0-cil libmono-peapi1.0-cil libmono-posix1.0-cil
  libmono-relaxng1.0-cil libmono-security1.0-cil libmono-sharpzip0.6-cil libmono-sharpzip0.84-cil libmono-sqlite1.0-cil libmono-system-data1.0-cil
  libmono-system-ldap1.0-cil libmono-system-messaging1.0-cil libmono-system-runtime1.0-cil libmono-system-web1.0-cil libmono-system1.0-cil
  libmono-webbrowser0.5-cil libmono-winforms1.0-cil libmono1.0-cil libmtp8 libnautilus-extension1 libpango1.0-common libperl5.10 libpolkit-gtk-1-0
  libpulse-browse0 librpm1 librpmbuild1 libsdl1.2-dev libsdl1.2debian-pulseaudio libseed0 libstdc++6-4.3-dev libtelepathy-farsight0 libupnp3 libvlccore4
  libxmlrpc-c3 linphone-nox linux-headers-2.6.32-5-amd64 linux-sound-base metacity mono-2.0-devel mono-devel mysql-client-5.1 mysql-query-browser
  mysql-server-5.1 mysql-server-core-5.1 openoffice.org-base-core openoffice.org-core openoffice.org-gcj openoffice.org-report-builder-bin
  openoffice.org-style-andromeda php5-suhosin portmap python-beagle python-brasero python-docky python-encutils python-evince python-gnomeapplet
  python-gtop python-mediaprofiles python-metacity python-totem-plparser seahorse-plugins smbfs speedbar totem-coherence tqsllib1c2a unixcw vlc
  xserver-xorg-video-nv
The following NEW packages will be installed:
  accountsservice acl aisleriot apg aptdaemon-data aptitude-common asterisk-core-sounds-en asterisk-modules asterisk-moh-opsound-gsm at-spi2-core
  ax25-node bluez btrfs-tools caribou caribou-antler chromium chromium-inspector colord console-setup console-setup-linux cpp-4.6 cpp-4.7 crda
  cryptsetup-bin cups-filters db-util db5.1-util dconf-gsettings-backend dconf-service dconf-tools distro-info-data docutils-common docutils-doc enchant
  extlinux finger folks-common fonts-cantarell fonts-droid fonts-freefont-ttf fonts-horai-umefont fonts-lg-aboriginal fonts-liberation fonts-lyx
  fonts-opensymbol fonts-sil-gentium fonts-sil-gentium-basic fonts-sipa-arundina fonts-stix fonts-takao fonts-takao-gothic fonts-takao-mincho
  fonts-thai-tlwg fonts-tlwg-garuda fonts-tlwg-kinnari fonts-tlwg-loma fonts-tlwg-mono fonts-tlwg-norasi fonts-tlwg-purisa fonts-tlwg-sawasdee
  fonts-tlwg-typewriter fonts-tlwg-typist fonts-tlwg-typo fonts-tlwg-umpush fonts-tlwg-waree fonts-umeplus fuse g++-4.7 g++-4.7-multilib gcc-4.6
  gcc-4.6-base gcc-4.7 gcc-4.7-base gcc-4.7-multilib gcj-4.7-base gcj-4.7-jre gcj-4.7-jre-headless gcj-4.7-jre-lib gconf-service gcr
  gir1.2-accountsservice-1.0 gir1.2-atk-1.0 gir1.2-atspi-2.0 gir1.2-caribou-1.0 gir1.2-clutter-1.0 gir1.2-clutter-gst-1.0 gir1.2-cogl-1.0
  gir1.2-coglpango-1.0 gir1.2-evince-3.0 gir1.2-folks-0.6 gir1.2-freedesktop gir1.2-gck-1 gir1.2-gconf-2.0 gir1.2-gcr-3 gir1.2-gdesktopenums-3.0
  gir1.2-gdkpixbuf-2.0 gir1.2-gee-1.0 gir1.2-gkbd-3.0 gir1.2-glib-2.0 gir1.2-gmenu-3.0 gir1.2-gnomebluetooth-1.0 gir1.2-gnomekeyring-1.0
  gir1.2-gst-plugins-base-0.10 gir1.2-gstreamer-0.10 gir1.2-gtk-3.0 gir1.2-gtkclutter-1.0 gir1.2-gtksource-3.0 gir1.2-gtop-2.0 gir1.2-gucharmap-2.90
  gir1.2-javascriptcoregtk-3.0 gir1.2-json-1.0 gir1.2-mutter-3.0 gir1.2-networkmanager-1.0 gir1.2-notify-0.7 gir1.2-panelapplet-4.0 gir1.2-pango-1.0
  gir1.2-peas-1.0 gir1.2-polkit-1.0 gir1.2-rb-3.0 gir1.2-soup-2.4 gir1.2-telepathyglib-0.12 gir1.2-telepathylogger-0.2 gir1.2-totem-1.0
  gir1.2-totem-plparser-1.0 gir1.2-upowerglib-1.0 gir1.2-vte-2.90 gir1.2-webkit-3.0 gir1.2-wnck-3.0 gir1.2-xkl-1.0 git-man gjs gkbd-capplet glchess
  glib-networking glib-networking-common glib-networking-services glines gnect gnibbles gnobots2 gnome-bluetooth gnome-contacts gnome-control-center-data
  gnome-desktop3-data gnome-font-viewer gnome-icon-theme-extras gnome-icon-theme-symbolic gnome-online-accounts gnome-packagekit gnome-packagekit-data
  gnome-shell gnome-shell-common gnome-sudoku gnome-sushi gnome-themes-standard gnome-themes-standard-data gnome-user-share gnome-video-effects gnomine
  gnotravex gnotski gnuplot gnuplot-nox grilo-plugins-0.1 groff growisofs gsettings-desktop-schemas gstreamer0.10-gconf gtali guile-2.0-libs gvfs-common
  gvfs-daemons gvfs-libs hardening-includes hwdata iagno ienglish-common imagemagick-common ioquake3 ioquake3-server iputils-tracepath ipxe-qemu iw
  keyutils kmod krb5-locales lib32itm1 lib32quadmath0 lib32tinfo-dev lib32tinfo5 libaacplus2 libaacs0 libabiword-2.9 libaccountsservice0 libamd2.2.0
  libapache-pom-java libapol4 libapt-inst1.5 libapt-pkg4.12 libaqbanking-plugins-libgwenhywfar60 libaqbanking34 libaqbanking34-plugins libaqhbci20
  libaqofxconnect7 libarchive12 libasprintf0c2 libassuan0 libatk-adaptor libatk-adaptor-data libatk-bridge2.0-0 libatkmm-1.6-1 libatkmm-1.6-dev
  libatspi2.0-0 libaudiofile1 libavahi-ui-gtk3-0 libavcodec53 libavcodec54 libavformat53 libavformat54 libavutil51 libbabl-0.1-0 libbind9-80 libbison-dev
  libblas3 libbluray1 libboost-iostreams1.49.0 libboost-program-options1.49.0 libboost-python1.49.0 libboost-serialization1.49.0 libboost-thread1.49.0
  libbrasero-media3-1 libcairo-gobject2 libcairo-script-interpreter2 libcamel-1.2-33 libcanberra-dev libcanberra-gtk3-0 libcanberra-gtk3-module
  libcanberra-pulse libcapi20-3 libcaribou-common libcaribou-gtk-module libcaribou-gtk3-module libcaribou0 libccrtp0 libcdio-cdda1 libcdio-paranoia1
  libcdio13 libcfg4 libchamplain-0.12-0 libchamplain-gtk-0.12-0 libcheese-gtk21 libcheese3 libclass-factory-util-perl libclass-isa-perl libclass-load-perl
  libclass-load-xs-perl libclutter-1.0-common libclutter-gst-1.0-0 libclutter-gtk-1.0-0 libclutter-imcontext-0.1-0 libclutter-imcontext-0.1-bin
  libcluttergesture-0.0.2-0 libcmis-0.2-0 libcogl-common libcogl-pango0 libcogl9 libcolord1 libcommons-parent-java libconfdb4 libcoroipcc4 libcoroipcs4
  libcpg4 libcryptsetup4 libcrystalhd3 libcupsfilters1 libcw3 libdata-alias-perl libdatetime-format-builder-perl libdatetime-format-iso8601-perl
  libdb-java libdb5.1 libdb5.1-dev libdb5.1-java libdb5.1-java-jni libdbus-c++-1-0 libdbus-glib1.0-cil libdbus1.0-cil libdconf0 libdee-1.0-4
  libdevel-partialdump-perl libdevhelp-3-0 libdevmapper-event1.02.1 libdistro-info-perl libdmapsharing-3.0-2 libdns88 libdotconf1.0 libdvbpsi7
  libebackend-1.2-2 libebml3 libebook-1.2-13 libecal-1.2-11 libecore1 libedata-book-1.2-13 libedata-cal-1.2-15 libedataserver-1.2-16
  libedataserverui-3.0-1 libeina1 libemail-valid-perl libencode-locale-perl libepc-1.0-3 libepc-ui-1.0-3 libept1.4.12 libescpr1 libev4
  libeval-closure-perl libevdocument3-4 libevent-2.0-5 libevent-perl libevs4 libevview3-3 libexiv2-12 libexosip2-7 libexporter-lite-perl
  libexttextcat-data libexttextcat0 libfakechroot libfarstream-0.1-0 libfdk-aac0 libfdt1 libfile-basedir-perl libfile-desktopentry-perl
  libfile-fcntllock-perl libfile-listing-perl libfile-mimeinfo-perl libfltk-images1.3 libfltk1.3 libfolks-eds25 libfolks-telepathy25 libfolks25
  libfont-afm-perl libgail-3-0 libgcj13 libgcj13-awt libgck-1-0 libgconf-2-4 libgconf2-doc libgcr-3-1 libgcr-3-common libgd2-xpm libgdata13
  libgdata2.1-cil libgdict-common libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common libgdk-pixbuf2.0-dev libgegl-0.2-0 libgeocode-glib0 libgettextpo0 libgexiv2-1
  libgirepository-1.0-1 libgjs0b libgkeyfile1.0-cil libgladeui-2-0 libgladeui-common libglapi-mesa libglew1.7 libglib2.0-bin libgmime-2.6-0
  libgmime2.6-cil libgmp10 libgnome-bluetooth10 libgnome-desktop-3-2 libgnome-keyring-common libgnome-media-profiles-3.0-0 libgnome-menu-3-0 libgnomekbd7
  libgnutls-openssl27 libgnutlsxx27 libgoa-1.0-0 libgoa-1.0-common libgphoto2-l10n libgraphite2-2.0.0 libgrilo-0.1-0 libgs9 libgs9-common libgssdp-1.0-3
  libgstreamer-plugins-bad0.10-0 libgtk-3-0 libgtk-3-bin libgtk-3-common libgtk-3-dev libgtk-3-doc libgtk-sharp-beans-cil libgtk-vnc-2.0-0
  libgtkhtml-4.0-0 libgtkhtml-4.0-common libgtkhtml-editor-4.0-0 libgtkmm-3.0-1 libgtksourceview-3.0-0 libgtksourceview-3.0-common libgucharmap-2-90-7
  libgudev1.0-cil libgupnp-1.0-4 libgupnp-av-1.0-2 libgupnp-igd-1.0-4 libgusb2 libgvnc-1.0-0 libgweather-3-0 libgwenhywfar-data libgwenhywfar60 libgxps2
  libhcrypto4-heimdal libheimbase1-heimdal libhtml-form-perl libhtml-format-perl libhttp-cookies-perl libhttp-daemon-perl libhttp-date-perl
  libhttp-message-perl libhttp-negotiate-perl libhunspell-1.3-0 libicu48 libimobiledevice2 libio-aio-perl libisc84 libisccc80 libisccfg82 libiscsi1
  libiso9660-8 libisoburn1 libitm1 libjavascriptcoregtk-1.0-0 libjavascriptcoregtk-3.0-0 libjbig0 libjs-sphinxdoc libjs-underscore libjson0 libjte1
  libkadm5clnt-mit8 libkadm5srv-mit8 libkarma0 libkdb5-6 libkmod2 libkpathsea6 liblapack3 liblavfile-2.0-0 liblavjpeg-2.0-0 liblavplay-2.0-0 liblcms2-2
  liblensfun-data liblensfun0 liblinear-tools liblinear1 liblinphone4 liblockfile-bin liblogsys4 liblvm2app2.2 liblwp-mediatypes-perl
  liblwp-protocol-https-perl liblwres80 liblzma5 libmaa3 libmagick++5 libmagickcore5 libmagickcore5-extra libmagickwand5 libmath-bigint-perl
  libmath-round-perl libmatroska5 libmediastreamer1 libmhash2 libminiupnpc5 libmission-control-plugins0 libmjpegutils-2.0-0 libmodule-implementation-perl
  libmodule-runtime-perl libmono-2.0-1 libmono-2.0-dev libmono-accessibility4.0-cil libmono-cairo4.0-cil libmono-codecontracts4.0-cil
  libmono-compilerservices-symbolwriter4.0-cil libmono-corlib4.0-cil libmono-csharp4.0-cil libmono-custommarshalers4.0-cil libmono-data-tds4.0-cil
  libmono-debugger-soft2.0-cil libmono-debugger-soft4.0-cil libmono-http4.0-cil libmono-i18n-cjk4.0-cil libmono-i18n-mideast4.0-cil
  libmono-i18n-other4.0-cil libmono-i18n-rare4.0-cil libmono-i18n-west4.0-cil libmono-i18n4.0-all libmono-i18n4.0-cil libmono-ldap4.0-cil
  libmono-management4.0-cil libmono-messaging-rabbitmq4.0-cil libmono-messaging4.0-cil libmono-microsoft-build-engine4.0-cil
  libmono-microsoft-build-framework4.0-cil libmono-microsoft-build-tasks-v4.0-4.0-cil libmono-microsoft-build-utilities-v4.0-4.0-cil
  libmono-microsoft-csharp4.0-cil libmono-microsoft-visualc10.0-cil libmono-microsoft-web-infrastructure1.0-cil libmono-npgsql4.0-cil
  libmono-opensystem-c4.0-cil libmono-oracle4.0-cil libmono-peapi4.0-cil libmono-posix4.0-cil libmono-rabbitmq4.0-cil libmono-relaxng4.0-cil
  libmono-security4.0-cil libmono-sharpzip4.84-cil libmono-simd4.0-cil libmono-sqlite4.0-cil libmono-system-componentmodel-composition4.0-cil
  libmono-system-componentmodel-dataannotations4.0-cil libmono-system-configuration-install4.0-cil libmono-system-configuration4.0-cil
  libmono-system-core4.0-cil libmono-system-data-datasetextensions4.0-cil libmono-system-data-linq4.0-cil libmono-system-data-services-client4.0-cil
  libmono-system-data-services4.0-cil libmono-system-data4.0-cil libmono-system-design4.0-cil libmono-system-drawing-design4.0-cil
  libmono-system-drawing4.0-cil libmono-system-dynamic4.0-cil libmono-system-enterpriseservices4.0-cil libmono-system-identitymodel-selectors4.0-cil
  libmono-system-identitymodel4.0-cil libmono-system-ldap4.0-cil libmono-system-management4.0-cil libmono-system-messaging4.0-cil
  libmono-system-net4.0-cil libmono-system-numerics4.0-cil libmono-system-runtime-caching4.0-cil libmono-system-runtime-durableinstancing4.0-cil
  libmono-system-runtime-serialization-formatters-soap4.0-cil libmono-system-runtime-serialization4.0-cil libmono-system-runtime4.0-cil
  libmono-system-security4.0-cil libmono-system-servicemodel-discovery4.0-cil libmono-system-servicemodel-routing4.0-cil
  libmono-system-servicemodel-web4.0-cil libmono-system-servicemodel4.0-cil libmono-system-serviceprocess4.0-cil libmono-system-transactions4.0-cil
  libmono-system-web-abstractions4.0-cil libmono-system-web-applicationservices4.0-cil libmono-system-web-dynamicdata4.0-cil
  libmono-system-web-extensions-design4.0-cil libmono-system-web-extensions4.0-cil libmono-system-web-routing4.0-cil libmono-system-web-services4.0-cil
  libmono-system-web4.0-cil libmono-system-windows-forms-datavisualization4.0-cil libmono-system-windows-forms4.0-cil libmono-system-xaml4.0-cil
  libmono-system-xml-linq4.0-cil libmono-system-xml4.0-cil libmono-system4.0-cil libmono-tasklets4.0-cil libmono-web4.0-cil libmono-webbrowser2.0-cil
  libmono-webbrowser4.0-cil libmono-webmatrix-data4.0-cil libmono-windowsbase4.0-cil libmount1 libmozjs10d libmozjs17d libmozjs185-1.0 libmpeg2encpp-2.0-0
  libmplex2-2.0-0 libmtdev1 libmtp-common libmtp-runtime libmtp9 libmupen64plus2 libmusicbrainz-discid-perl libmusicbrainz5-0 libmutter0 libmx-1.0-2
  libmx-bin libmx-common libmysqlclient18 libnatpmp1 libnautilus-extension1a libnet-domain-tld-perl libnet-http-perl libnet-ip-minimal-perl libnetcf1
  libnetfilter-conntrack3 libnettle4 libnewtonsoft-json4.5-cil libnice10 libnl-3-200 libnl-genl-3-200 libnl-route-3-200 libnm-glib4 libnm-gtk-common
  libnm-gtk0 libnm-util2 libnotify4 libnspr4 libnss-winbind libnss3 libnuma1 libnunit2.6-cil liboauth0 libodbc1 liboobs-1-5 libopal3.10.4 libopenal-data
  libopus0 libosip2-7 libp11-2 libp11-kit-dev libp11-kit0 libpackage-stash-xs-perl libpackagekit-glib2-14 libpam-cap libpam-modules-bin libpam-winbind
  libpanel-applet-4-0 libparams-classify-perl libpcre3-dev libpcrecpp0 libpeas-1.0-0 libpeas-common libperl5.14 libpipeline1 libpload4 libpodofo0.9.0
  libpoe-component-resolver-perl libpoppler-glib8 libpoppler19 libportsmf0 libpostproc52 libprocps0 libpst4 libpt2.10.4 libptexenc1 libpython2.7
  libqt4-declarative libqtassistantclient4 libqtdbus4 libqtwebkit4 libquadmath0 libquicktime2 libquorum4 libquvi-scripts libquvi7 libraptor2-0 librasqal3
  libraw5 libregexp-reggrp-perl libreoffice libreoffice-base libreoffice-base-core libreoffice-calc libreoffice-common libreoffice-core libreoffice-draw
  libreoffice-emailmerge libreoffice-evolution libreoffice-filter-binfilter libreoffice-filter-mobiledev libreoffice-gnome libreoffice-gtk
  libreoffice-help-en-us libreoffice-impress libreoffice-java-common libreoffice-math libreoffice-officebean libreoffice-report-builder-bin
  libreoffice-style-galaxy libreoffice-style-tango libreoffice-writer libresid-builder0c2a librest-0.7-0 librest-extras-0.7-0 librhythmbox-core6 librpm3
  librpmbuild3 librpmio3 librpmsign1 libruby1.9.1 libsaamf3 libsackpt3 libsaclm3 libsaevt3 libsalck3 libsam4 libsamsg4 libsane-common
  libsane-extras-common libsatmr3 libsbsms10 libseed-gtk3-0 libsidplay2 libsigsegv2 libsocialweb-client2 libsocialweb-common libsocialweb-service
  libsocialweb0 libsocket-getaddrinfo-perl libsocket-perl libsonic0 libsoundtouch0 libsox2 libspeechd2 libspice-client-glib-2.0-1
  libspice-client-gtk-2.0-1 libspice-server1 libssl-doc libssl1.0.0 libstdc++6-4.7-dev libsvm-tools libswitch-perl libswscale2 libsystemd-daemon0
  libsystemd-login0 libtagc0 libtelepathy-farstream2 libtelepathy-logger2 libtest-warn-perl libtinfo-dev libtinfo5 libtirpc1 libtokyocabinet9 libtotem-pg4
  libtotem0 libtqsllib1 libtracker-sparql-0.14-0 libtree-dagnode-perl libts-dev libucommon5 libumfpack5.4.0 libunique-3.0-0 libupnp6 libusbredirhost1
  libusbredirparser0 libv4lconvert0 libverto-libev1 libverto1 libvisio-0.0-0 libvlccore5 libvo-aacenc0 libvo-amrwbenc0 libvorbisidec1 libvotequorum4
  libvpx1 libvte-2.90-9 libvte-2.90-common libwacom-common libwacom2 libwebkitgtk-1.0-0 libwebkitgtk-1.0-common libwebkitgtk-3.0-0 libwebkitgtk-3.0-common
  libwebp2 libwebrtc-audio-processing-0 libwildmidi-config libwireshark-data libwireshark2 libwiretap2 libwnck-3-0 libwnck-3-common libwpd-0.9-9
  libwpg-0.2-2 libwps-0.2-2 libwsutil2 libwv-1.2-4 libwww-robotrules-perl libx11-doc libx11-protocol-perl libx264-123 libx264-124 libx264-130 libx264-132
  libxalan2-java libxcb-composite0 libxcb-glx0 libxcb-shape0 libxcb-shm0-dev libxcb-util0 libxen-4.1 libxml-commons-external-java
  libxml-commons-resolver1.1-java libxml-sax-base-perl libxmlrpc-c++4 libxmlrpc-core-c3 libxz-java libyajl2 libyaml-0-2 libyaml-perl libyelp0 libzrtpcpp2
  libzvbi-common libzvbi0 lightsoff linphone-nogtk linux-headers-3.2.0-4-amd64 linux-headers-3.2.0-4-common linux-headers-amd64 linux-image-3.2.0-4-amd64
  linux-image-amd64 linux-kbuild-3.2 live-boot-doc live-config-doc live-manual-html mahjongg memtest86+ minissdpd mono-4.0-gac mono-dmcs mscompress
  multiarch-support mupen64plus-audio-all mupen64plus-audio-sdl mupen64plus-data mupen64plus-input-all mupen64plus-input-sdl mupen64plus-rsp-all
  mupen64plus-rsp-hle mupen64plus-rsp-z64 mupen64plus-ui-console mupen64plus-video-all mupen64plus-video-arachnoid mupen64plus-video-glide64
  mupen64plus-video-rice mupen64plus-video-z64 mutter-common mysql-client-5.5 mysql-server-5.5 mysql-server-core-5.5 mythes-en-us openarena-081-maps
  openarena-081-misc openarena-081-players openarena-081-players-mature openarena-081-textures openarena-085-data openarena-088-data packagekit
  packagekit-backend-aptcc packagekit-tools planner-data planner-doc poppler-data printer-driver-all printer-driver-c2050 printer-driver-c2esp
  printer-driver-cjet printer-driver-escpr printer-driver-foo2zjs printer-driver-gutenprint printer-driver-hpcups printer-driver-hpijs
  printer-driver-m2300w printer-driver-min12xxw printer-driver-pnm2ppa printer-driver-postscript-hp printer-driver-ptouch printer-driver-pxljr
  printer-driver-sag-gdi printer-driver-splix psutils python-aptdaemon.gtk3widgets python-aptdaemon.gtkwidgets python-bzrlib python-dbus-dev
  python-debianbts python-defer python-dnspython python-fpconst python-gi python-gi-cairo python-gi-dev python-gobject-2 python-gobject-2-dev
  python-keyring python-launchpadlib python-lazr.restfulclient python-lazr.uri python-liblarch python-liblarch-gtk python-magic python-oauth
  python-packagekit python-pyatspi2 python-pyparsing python-repoze.lru python-routes python-setools python-simplejson python-soappy python-speechd
  python-spice-client-gtk python-wadllib python-webob python-zeitgeist python2.7 python2.7-dev python2.7-minimal qdbus quadrapassel remmina-common
  rhythmbox-data rpcbind rtkit ruby ruby1.9.1 shotwell-common smartdimmer software-properties-common sound-theme-freedesktop speech-dispatcher
  sphinx-common sphinx-doc swell-foop syslinux-themes-debian syslinux-themes-debian-wheezy tdb-tools telepathy-haze telepathy-logger telepathy-rakia
  tex-gyre ttf-marvosym wireless-regdb xbrlapi xorg-sgml-doctools xorriso xserver-xorg-input-mouse xserver-xorg-input-vmmouse xulrunner-17.0 yelp-xsl
  zeitgeist-core zenity-common
The following packages have been kept back:
  acroread-debian-files db4.8-util hibernate ia32-libs ia32-libs-gtk libboost-dev libboost-serialization-dev opensc wine
The following packages will be upgraded:
  abcde abiword abiword-common abiword-plugin-grammar abiword-plugin-mathview acpi acpi-fakekey acpi-support acpi-support-base acpid acroread-data
  acroread-dictionary-en acroread-l10n-en adduser alacarte alsa-base alsa-utils amb-plugins anacron analog ant ant-optional apache2 apache2-doc
  apache2-mpm-prefork apache2-utils apache2.2-bin apache2.2-common app-install-data apt apt-file apt-utils apt-xapian-index aptdaemon aptitude
  aqbanking-tools aspell aspell-en asterisk asterisk-config asterisk-core-sounds-en-gsm asterisk-doc asterisk-voicemail astyle at audacity audacity-data
  augeas-lenses augeas-tools autoconf autoconf-doc automake automake1.9 autopoint autotools-dev avahi-autoipd avahi-daemon avidemux avidemux-common
  avidemux-plugins aview ax25-tools banshee baobab base-files base-passwd bash bash-completion bc bind9-doc bind9-host bind9utils binfmt-support binutils
  bison bluez-cups bogofilter bogofilter-bdb bogofilter-common brasero brasero-common bridge-utils browser-plugin-gnash bsd-mailx bsdmainutils bsdutils
  busybox buzztard buzztard-data bwidget bzip2 bzr bzrtools ca-certificates calibre calibre-bin ccache cd-discid cdebootstrap cdparanoia cdrdao
  checkpolicy cheese cheese-common chromium-browser chromium-browser-inspector cifs-utils cl-asdf cli-common clisp comerr-dev common-lisp-controller
  console-common console-data console-tools consolekit coreutils cowbuilder cowdancer cpio cpp cpp-4.4 cpufrequtils cracklib-runtime crawl-common
  crawl-tiles cron cryptsetup cups cups-bsd cups-client cups-common cups-driver-gutenprint cups-pk-helper cups-ppdc cupsddk curl curlftpfs cvs cw dash
  dasher dasher-data dbus dbus-x11 dc dcraw dctrl-tools debconf debconf-i18n debhelper debian-archive-keyring debian-faq debian-keyring debianutils debirf
  debootstrap desktop-base desktop-file-utils devhelp devhelp-common devscripts dialog dict dictionaries-common diffstat diffutils djtools dkms dmidecode
  dmsetup dnsmasq-base dnsutils doc-debian docbook docbook-dsssl docbook-to-man docbook-utils docbook-xml docbook-xsl docbook-xsl-doc-html docky dosemu
  dosfstools dpatch dpkg dpkg-dev dput dvd+rw-tools dvi2ps dynagen dynamips e2fslibs e2fsprogs ebtables ed eject ekiga emacs23-bin-common emacs23-common
  emacs23-nox emacsen-common emdebian-archive-keyring empathy empathy-common eog epiphany-browser epiphany-browser-data epiphany-extensions esound-common
  espeak espeak-data ethtool evince evince-common evolution evolution-common evolution-data-server evolution-data-server-common evolution-exchange
  evolution-plugins evolution-webcal exif exiftags exim4 exim4-base exim4-config exim4-daemon-light exiv2 f-spot fakechroot fakeroot fancontrol fceu
  fcrackzip fdupes feynmf file file-roller finch findutils firmware-iwlwifi firmware-linux-free firmware-linux-nonfree flac flashrom fldigi flex
  fontconfig fontconfig-config foo2zjs foomatic-db foomatic-db-engine foomatic-db-gutenprint foomatic-filters fping freedesktop-sound-theme freeglut3
  freetds-common ftp fuse-utils g++ g++-4.4 g++-4.4-multilib g++-multilib gawk gcalctool gcc gcc-4.4 gcc-4.4-base gcc-4.4-doc gcc-4.4-multilib
  gcc-doc-base gcc-multilib gcj-jre gcj-jre-headless gconf-defaults-service gconf-editor gconf2 gconf2-common gddrescue gdebi gdebi-core gedit
  gedit-common gedit-plugins genisoimage geoclue geoclue-hostip geoclue-localnet geoclue-manual geoclue-yahoo geoip-database gettext gettext-base
  ghostscript ghostscript-cups gimp gimp-data git git-buildpackage git-core git-svn gitk gksu glade gnash gnash-common gnash-opengl
  gnome-accessibility-themes gnome-applets-data gnome-backgrounds gnome-cards-data gnome-common gnome-control-center gnome-control-center-dev
  gnome-desktop-data gnome-dictionary gnome-disk-utility gnome-do gnome-do-plugins gnome-doc-utils gnome-games gnome-games-data gnome-games-extra-data
  gnome-icon-theme gnome-js-common gnome-keyring gnome-mag gnome-media gnome-menus gnome-nettool gnome-orca gnome-panel-data gnome-pkg-tools
  gnome-power-manager gnome-rdp gnome-screensaver gnome-screenshot gnome-search-tool gnome-session gnome-session-bin gnome-session-canberra
  gnome-session-common gnome-settings-daemon gnome-settings-daemon-dev gnome-system-log gnome-system-monitor gnome-system-tools gnome-terminal
  gnome-terminal-data gnome-user-guide gnomint gnu-fdisk gnucash-docs gnuchess gnumeric gnumeric-common gnupg gnupg-agent gocr google-talkplugin gparted
  gpgv gpredict gpscorrelate grep groff-base grub-common grub-legacy gsfonts-x11 gsmartcontrol gstreamer0.10-alsa gstreamer0.10-buzztard
  gstreamer0.10-buzztard-doc gstreamer0.10-doc gstreamer0.10-ffmpeg gstreamer0.10-ffmpeg-dbg gstreamer0.10-fluendo-mp3 gstreamer0.10-gnonlin
  gstreamer0.10-gnonlin-dbg gstreamer0.10-gnonlin-doc gstreamer0.10-nice gstreamer0.10-plugins-bad gstreamer0.10-plugins-bad-dbg
  gstreamer0.10-plugins-bad-doc gstreamer0.10-plugins-base gstreamer0.10-plugins-base-apps gstreamer0.10-plugins-base-dbg gstreamer0.10-plugins-base-doc
  gstreamer0.10-plugins-good gstreamer0.10-plugins-good-dbg gstreamer0.10-plugins-good-doc gstreamer0.10-plugins-ugly gstreamer0.10-plugins-ugly-dbg
  gstreamer0.10-plugins-ugly-doc gstreamer0.10-pulseaudio gstreamer0.10-tools gstreamer0.10-x gtg gthumb gthumb-data gtk2-engines gtk2-engines-pixbuf
  gucharmap guile-1.6 guile-1.6-libs guile-1.8-libs gvfs gvfs-backends gvfs-bin gzip hal hamster-applet hardinfo hddtemp hdparm hfsprogs hostname hp-ppd
  hpijs hplip hplip-cups hplip-data htmldoc htmldoc-common iamerican ibritish iceweasel ifupdown ijsgutenprint imagemagick imagemagick-doc info
  initramfs-tools initscripts inkscape insserv install-info installation-report intltool iotop iproute ipsec-tools iptables iptraf iputils-ping
  ircd-hybrid irssi isc-dhcp-client isc-dhcp-common isc-dhcp-server iscsitarget-dkms iso-codes ispell jack jadetex java-common jigdo-file keyanalyze
  keyboard-configuration keychain klibc-utils kpartx krb5-admin-server krb5-auth-dialog krb5-config krb5-doc krb5-kdc krb5-kdc-ldap krb5-multidev
  krb5-pkinit krb5-user lacheck lame latex-beamer latex-xcolor less lesstif2 lesstif2-dev lib32asound2 lib32bz2-1.0 lib32gcc1 lib32gomp1 lib32ncurses5
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  python-sqlitecachec python-support python-tagpy python-twisted-bin python-twisted-conch python-twisted-core python-twisted-web python-uno
  python-utidylib python-vte python-webkit python-wnck python-xapian python-xdg python-zope.interface python2.6 python2.6-dev python2.6-minimal
  qemu-keymaps qemu-kvm qemu-system qemu-user-static qemu-utils qt4-qtconfig quagga quagga-doc quilt radeontool rdesktop readline-common realpath recode
  remmina reportbug resolvconf rhythmbox rhythmbox-plugins rinse ripit rpm rpm-common rpm2cpio rsync rsyslog samba samba-common samba-common-bin samba-doc
  sane-utils scons screen seabios seahorse sed selinux-policy-default sensible-utils sensors-applet setools sflphone-daemon sflphone-data sflphone-gnome
  sgml-base sgml-data shared-mime-info sharutils shorewall-core shorewall6 shotwell siege signing-party simple-scan slapd smartmontools smbclient smistrip
  snd snd-gtk-pulse snmp software-center software-properties-gtk sound-juicer soundmodem sox sp spidermonkey-bin squashfs-tools ssh-krb5 sshfs ssl-cert
  strace strongswan strongswan-ikev1 strongswan-ikev2 strongswan-starter subversion sudo svn-buildpackage swat synaptic synergy syslinux syslinux-common
  system-config-printer system-config-printer-udev system-tools-backends system-tools-backends-dev sysv-rc sysvinit sysvinit-utils tar tasksel
  tasksel-data tcl tcl8.4 tcl8.5 tcpd tcpdump telepathy-gabble telepathy-mission-control-5 telepathy-salut telepathy-sofiasip tex-common texinfo
  texlive-base texlive-binaries texlive-common texlive-doc-base texlive-extra-utils texlive-font-utils texlive-fonts-recommended
  texlive-fonts-recommended-doc texlive-generic-recommended texlive-latex-base texlive-latex-base-doc texlive-latex-recommended
  texlive-latex-recommended-doc texlive-luatex texlive-metapost texlive-metapost-doc texlive-pstricks texlive-pstricks-doc texlive-xetex tidy time tinymce
  tipa tk tk8.4 tk8.5 tofrodos tomboy toshset totem totem-common totem-mozilla totem-plugins traceroute transfig transmission-cli transmission-common
  transmission-gtk trustedqsl tsconf ttf-ancient-fonts ttf-dejavu ttf-dejavu-core ttf-dejavu-extra ttf-freefont ttf-lg-aboriginal ttf-liberation ttf-lyx
  ttf-opensymbol ttf-sil-gentium ttf-sil-gentium-basic ttf-takao ttf-takao-gothic ttf-takao-mincho ttf-thai-arundina ttf-thai-tlwg ttf-umefont ttf-umeplus
  ttf-unifont twm twolame tzdata ucf udev udisks ufraw-batch unattended-upgrades unetbootin unetbootin-translations unifont unixodbc uno-libs3 unp unrar
  unzip update-inetd update-manager-core update-manager-gnome update-notifier update-notifier-common upower ure usbmuxd usbutils util-linux vde2 vflib3
  vgabios vim-common vim-tiny vino virt-manager virt-viewer virtinst vlc-data vlc-nox vlc-plugin-notify vlc-plugin-pulse vpnc vzctl w3m wamerican wdiff
  wget whiptail whois winbind wireless-tools wireshark wireshark-common wordnet wordnet-base wordnet-gui wpasupplicant wvdial wwwconfig-common x11-apps
  x11-common x11-session-utils x11-utils x11-xfs-utils x11-xkb-utils x11-xserver-utils x11proto-composite-dev x11proto-core-dev x11proto-damage-dev
  x11proto-dri2-dev x11proto-fixes-dev x11proto-fonts-dev x11proto-gl-dev x11proto-input-dev x11proto-kb-dev x11proto-print-dev x11proto-randr-dev
  x11proto-render-dev x11proto-resource-dev x11proto-video-dev x11proto-xext-dev x11proto-xf86dri-dev x11proto-xf86vidmode-dev x11proto-xinerama-dev xauth
  xbase-clients xbitmaps xca xclip xdemorse xdg-user-dirs xdg-user-dirs-gtk xdg-utils xen-tools xen-utils-common xenstore-utils xfonts-100dpi
  xfonts-100dpi-transcoded xfonts-75dpi xfonts-75dpi-transcoded xfonts-a12k12 xfonts-ayu xfonts-baekmuk xfonts-base xfonts-bitmap-mule
  xfonts-biznet-100dpi xfonts-biznet-75dpi xfonts-biznet-base xfonts-cyrillic xfonts-efont-unicode xfonts-efont-unicode-ib xfonts-encodings
  xfonts-jisx0213 xfonts-kaname xfonts-kapl xfonts-mathml xfonts-mona xfonts-naga10 xfonts-scalable xfonts-terminus xfonts-terminus-dos
  xfonts-terminus-oblique xfonts-thai xfonts-thai-etl xfonts-thai-manop xfonts-thai-nectec xfonts-thai-poonlap xfonts-thai-vor xfonts-tipa xfonts-unifont
  xfonts-utils xfonts-wqy xindy xindy-rules xinit xkb-data xml-core xorg xorg-docs-core xoscope xsane xsane-common xserver-common xserver-xephyr
  xserver-xorg xserver-xorg-core xserver-xorg-dev xserver-xorg-input-all xserver-xorg-input-evdev xserver-xorg-input-synaptics xserver-xorg-input-wacom
  xserver-xorg-video-apm xserver-xorg-video-ark xserver-xorg-video-ati xserver-xorg-video-chips xserver-xorg-video-cirrus xserver-xorg-video-fbdev
  xserver-xorg-video-i128 xserver-xorg-video-intel xserver-xorg-video-mach64 xserver-xorg-video-mga xserver-xorg-video-neomagic
  xserver-xorg-video-openchrome xserver-xorg-video-r128 xserver-xorg-video-radeon xserver-xorg-video-rendition xserver-xorg-video-s3
  xserver-xorg-video-s3virge xserver-xorg-video-savage xserver-xorg-video-siliconmotion xserver-xorg-video-sis xserver-xorg-video-sisusb
  xserver-xorg-video-tdfx xserver-xorg-video-trident xserver-xorg-video-tseng xserver-xorg-video-vesa xserver-xorg-video-vmware xserver-xorg-video-voodoo
  xsltproc xterm xtightvncviewer xtrans-dev xutils-dev xz-utils yelp yum zenity zip zlib1g zlib1g-dev
2160 upgraded, 944 newly installed, 133 to remove and 9 not upgraded.
Need to get 90.5 MB/2,928 MB of archives.
After this operation, 1,287 MB of additional disk space will be used.
Do you want to continue [Y/n]? 

22 January 2014

Erich Schubert: The init wars

The init wars have recently caught a lot of media attention (e.g. heise, prolinux, phoronix). However, one detail that is often overlooked: Debian is debating over the default, while all of them are already supported to a large extend, actually. Most likely, at least two of them will be made mandatory to support IMHO.
The discussion seems to be quite heated, with lots of people trying to evangelize for their preferred system. This actually only highlights that we need to support more than one, as Debian has always been about choice. This may mean some extra work for the debian-installer developers, because choosing the init system at install time (instead of switching later) will be much easier. More often than not, when switching from one init system to another you will have to perform a hard reset.
If you want to learn about the options, please go to the formal discussion page, which does a good job at presenting the positions in a neutral way.
Here is my subjective view of the init systems:
  • SysV init is the current default, and thus deserves to be mentioned first. It is slow, because it is based on a huge series of shell scripts. It can often be fragile, but at the same time it is very transparent. For a UNIX system administrator, SysV init is probably the preferred choice. You only reboot your servers every year anyway.
  • upstart seems to be a typical Canonical project. It solves a great deal of problems, but apparently isn't good enough at it for everybody, and they fail at including anyone in their efforts. Other examples of these fails include Unity and Mir, where they also announced the project as-is, instead of trying to get other supporters on board early (AFAICT). The key problem to widespread upstart acceptance seems to be the Canonical Contributor License Agreement that many would-be contributors are unwilling to accept. The only alternative would be to fork upstart completely, to make it independent of Canonical. (Note that upstart nevertheless is GPL, which is why it can be used by Debian just fine. The CLA only makes getting patches and enhancements included in the official version hard.)
  • systemd is the rising star in the init world. It probably has the best set of features, and it has started to incorporate/replace a number of existing projects such as ConsoleKit. I.e. it not only manages services, but also user sessions. It can be loosely tied to the GNOME project which has started to rely on it more and more (much to the unhappyness of Canonical, who used to be a key player for GNOME; note that officially, GNOME chose to not depend on systemd, yet I see this as the only reliable combination to get a complete GNOME system running, and since "systemd can eventually replace gnome-session" I foresee this tie to become closer). As the main drawback, systemd as is will (apparently) only work with the Linux kernel, whereas Debian has to also support kFreeBSD, NetBSD, Hurd and the OpenSolaris kernels (some aren't officially supported by Debian, but by separate projects).
So my take: I believe the only reasonable default is systemd. It has the most active development community and widest set of features. But as it cannot support all architectures, we need mandatory support for an alternative init system, probably SysV. Getting both working reliably will be a pain, in particular since more and more projects (e.g. GNOME) tie themselves closely to systemd, and would then become Linux-only or require major patches.
I have tried only systemd on a number of machines, and unfortunately I cannot report it as "prime time ready" yet. You do have the occasional upgrade problems and incompatibilities, as it is quite invasive. From screensavers activating during movies to double suspends, to being unable to shutdown my system when logged in (systemd would treat the login manager as separate session, and not being the sole user it would not allow me to shut down), I have seen quite a lot of annoyances happen. This is an obvious consequence of the active development on systemd. This means that we should make the decision early, because we will need a lot of time to resolve all these bugs for the release.
There are more disruptions coming on the way. Nobody seems to have talked about kDBUS yet, the integration of an IPC mechanism like DBUS into the Linux kernel. It IMHO has a good chance of making it into the Linux kernel rather soon, and I wouldn't be surprised if it became mandatory for systemd soon after. Which then implies that only a recent kernel (say, mid-2014) version might be fully supported by systemd soon.
I would also like to see less GNOME influence in systemd. I have pretty much given up on the GNOME community, which is moving into a UI direction that I hate: they seem to only care about tablet and mobile phones for dumb users, and slowly turn GNOME into an android UI; selling black background as major UI improvements. I feel that the key GNOME development community does not care about developers and desktop users like me anymore (but dream of being the next Android), and therefore I have abandoned GNOME and switched to XFCE.
I don't give upstart much of a chance. Of course there are some Debian developers already involved in its development (employed by Canonical), so this will cause some frustration. But so far, upstart is largely an Ubuntu-only solution. And just like Mir, I don't see much future in it; instead I foresee Ubuntu going systemd within a few years, because it will want to get all the latest GNOME features. Ubuntu relies on GNOME, and apparently GNOME already has chosen systemd over upstart (even though this is "officially" denied).
Sticking with SysV is obviously the easiest choice, but it does not make a lot of sense to me technically. It's okay for servers, but more and more desktop applications will start to rely on systemd. For legacy reasons, I would however like to retain good SysV support for at least 5-10 more years.

But what is the real problem? After all, this is a long overdue decision.
  • There is too much advocacy and evangelism, from either side. The CTTE isn't really left alone to do a technical decision, but instead the main factors have become of political nature, unfortunately. You have all kinds of companies (such as Spotify) weigh in on the debate, too.
  • The tone has become quite aggressive and emotional, unfortunately. I can already foresee some comments on this blog post "you are a liar, because GNOME is now spelled Gnome!!1!".
  • Media attention. This upcoming decision has been picked up by various Linux media already, increasing the pressure on everybody.
  • Last but not least, the impact will be major. Debian is one of the largest distributions, last but not least used by Ubuntu and Steam, amongst others. Debian preferring one over the other will be a slap in somebodys face, unfortunately.
So how to solve it? Let the CTTE do their discussions, and stop flooding them with mails trying to influence them. There has been so much influencing going on, it may even backfire. I'm confident they will find a reasonable decision, or they'll decide to poll all the DDs. If you want to influence the outcome provide patches to anything that doesn't yet fully support your init system of choice! I'm sure there are hundreds of packages which do neither have upstart nor systemd support yet (as is, I currently have 27 init.d scripts launched by systemd, for example). IMHO, nothing is more convincing than have things just work, and of course, contributing code. We are in open source development, and the one thing that gets you sympathy in the community is to contribute code to someone elses project. For example, contribute full integrated power-management support into XFCE, if you include power management functionality.
As is, I have apparently 7 packages installed with upstart support, and 25 with systemd support. So either, everybody is crazy about systemd, or they have the better record of getting their scripts accepted upstream. (Note that this straw poll is biased - with systemd, the benefits of not using "legacy" init.d script may just be larger).

28 October 2013

Matthias Klumpp: Tanglu update & release plans

Long time with no article about Tanglu! This was mainly because we were busy with the project itself, improving various aspects of the distribution. So, here is a new summary on what has been done and what you can expect from the first release ;-) Tanglu QA We further improved the automatic archive QA. There is now qa.tanglu.org, which constantly monitors the number of uninstallable or unbuildable packages in the Tanglu suites. It also provides tanglu-platform-smallstatus information on the metapackage generator, which helps us in finding out which packages are available on the live-cds. Furthermore, information about the staging->devel migration process is provided, to answer the question why a package does not migrate (this still needs some improvements, but it is being worked on). We also use some code from Ubuntu to monitor package versions in Debian and upstream, which helps to see if others have released newer versions of software shipped with Tanglu. This already resulted in many improvements: The Tanglu Aequorea suite does not contain unbuildable packages (at least not due to build-dependency changed), and all live-cds are working well. We will soon migrate the archive to a new server, which frees some server capacities we can use for automated QA and things like automatic live-CD building. Live-CDs, Installer, Alpha-Releases We currently don t do Alpha-Releases of Tanglu, but we create Live-CD snapshots of Tanglu, which are available at releases.tanglu.org (or mirror1, mirror2). These snapshots still have issues and are just early previews. They also ship without and installer, we are still working on that part. Please note that CD more or less means DVD or USB-Stick right now (and this won t change the expected image size will be around 800MB). Release Planning I am happy to announce that we will do a release this year, most likely in December. But what can you expect from the release? KDE 4.11kde-konqui We will ship with KDE 4.11, which will be the only desktop we officially support so far. The reason is simply lack of manpower we could promise to support more, but that would just be not realistic for the small team. So we focus on KDE (Plasma Shells) right now, and try to make it awesome. Also, the team consists mostly of KDE people right now, which contributed to that decision ;-) . If you want to try Tanglu, right now the KDE live-images are the best to try it out. GNOME 3.8 gnome-logoWe will also provide images with GNOME. The problem with GNOME is, that the GNOME team does not have enough manpower to maintain the whole desktop or to upgrade it to the latest version (it is essentially just me looking at it from time to time). So GNOME will be available in a preview state. We invite everyone with GNOME knowledge to join the project and help improving Tanglu-GNOME GNOMErs, we want you! systemd >= 204 We ship with systemd by default, which works nicely so far, although more testing needs to be done. The logind service will be used to replace ConsoleKit, if we manage to get everything in place and working in time (if there are issues, we might switch back to CK for one release). There are some plans to use a higher systemd version, due to some improvements made there, but if this will be done is still unclear (Debian will most likely stick to 204 for some time, because with systemd > 205, running it as pid 1 will be mandatory to use logind (and Debian is just in the process to decide which init-system we will use there)). Systemd will run in SysVInit compatibility mode for most of the available services. This will improve in later Tanglu releases. Of course, systemd is usable, even if not every init-script has been converted to a service file. It just has an impact on startup times, so Tanglu will not be the distributions with the fastest startup times (yet ;-) ). Debian Package Mixdebian_logo1 Tanglu consists mostly of packages from Debian Testing (Jessie), but we take full advantage of the Debian archive, so you will also find package versions from Unstable or even Experimental (where it made sense). A very small portion of packages has also been merged with Ubuntu. Although stuff has been changed, the incompatibilities with Debian are almost zero, so if you are installing Tanglu, it will currently feel like an more up-to-date Debian Testing with some extras. Still, the differences are large enough that upgrading a Debian system to Tanglu might result in some issues. Installer Right now, the installer is a major field of work. Tanglu will most likely ship with the Debian-Installer, because it is the easiest thing to do right now. For later releases, it is planned to also offer the Ubiquity installer (the thing Ubuntu uses), or a new installer with a similar UI and concept. Other Cool Things266px-Wayland_Logo Tanglu will ship with a fully working Qt5 (which is currently being tested and updated) and the latest version of Wayland/Weston as a preview for developers to play around with. We also ship with Perl 5.18 and Haskell GHC 7.6, as well as with GCC 4.8 as default compiler (although the whole distribution does not yet compile with GCC 4.8). We might ship with Linux 3.12, but this also depends on other things. The Linux kernel build will be the same as in Debian. There might be more things to come :-) Please do always keep in mind that Tanglu is a new project, so the first release might still have some teething problems but we re working on it. The Aequorea release will be supported one to two more months after the next release is out. Tanglu Policy I started to draft a Tanglu policy, which defines stuff like the procedures to become a Tanglu project member and/or developer, some basic values of the distribution, decision making processes etc. This work is at a very early stage right now, and will need lots of feedback later. But as soon as it is done, joining the project will be easier and what Tanglu is will be well-defined. The policy will also include a Code-of-Conduct as an additional document from the start. We need help! ;-) First of all, thanks to everyone working on Tanglu! You are amazing! Also, many thanks to every Debian developer or contributor who helped a lot in setting the project up and contributed knowledge. And of course, thanks to everyone else who contributed by creating awesome artwork, helped with code, TangluTanglu Logo (big) archive mirrors, buildd-servers or by testing the distribution and providing feedback! (given the state the aequorea suite was in at the beginning, testing was a really frustrating activity but people still did it!) So, if you would like to help, just find us on #tanglu-devel on Freenode or join the tg-devel mailinglist. We also really need some people taking care of the Tanglu website and updating it with some recent information from time to time, so people can see what is going on. Before we have the Tanglu policy finished and the Tanglu members and developers directory in place (a software which allows us to track all registered developers and gives them an @tanglu.org mailalias), the start might be a bit confusing, but we do our best to make it easy for new people to join. The best way is asking people. Tanglu is still created by an incredibly small team, which has a large task to accomplish. Help is welcome :-)

3 September 2013

Miriam Ruiz: pySioGame: Educational activities and games for kids

I discovered pySioGame for the first time in the first half of 2012, and even though it was still in a beta state, I liked it a lot. pySioGame is essentially a set of educational activities and games for kids. pySioGame was initially developed by its author -Ireneusz Imiolek- for his son, but he soon decided to make it Free Software. And I m glad that he did, because it s a very cute application. Even though -in it s author s own words- it s hard to put age range on this kind of games, it is primarily targeted to children from as young as 3 years old, up to about 10 years old. The activities included, many of which are grid based, cover topics like maths, reading, writing, painting, and memory activities, among others. I was finally able to upload pySioGame to Debian during the DebConf, and it has very recently hit the archive. I m convinced that pySioGame is soon going to be one of the references among the free programs for small kids, among titles such as GCompris, ChildsPlay, PySyCache, or Bouncy. Or, even though it s not in the archives, Omnitux. Finally, to whet your appetite, here is the link to a video, and there go some screenshots:

5 March 2013

Tanguy Ortolo: Suspend your computer from a non-mainstream desktop environment

Battery icon UPower for regular users Major desktop environments usually provide a user-friendly menu to suspend your computer. Internally, if seems to use something called UPower, which uses something called PolicyKit, which in turn may or may not use another piece called ConsoleKit (do not ask me what all these pieces are and how they relate to each other, I do not know and I do not want to know). For the regular user, the result is the following: when they click on that button, it suspends their computer.UPower for command line users However, if you are using a more unusual desktop environment, for instance a simple, light window manager, you will not have such a button. And no, UPower does not provide a simple command line tool to suspend your computer (they probably consider that command line is out of fashion ). Well, in case you need it, here is a way to suspend your computer from a command line or whatever: just alias it or bind it to a key shortcut. It uses some dark DBus magic:
$ dbus-send --system --print-reply --dest='org.freedesktop.UPower' \
    /org/freedesktop/UPower org.freedesktop.UPower.Suspend
If you prefer to hibernate your computer, that is, to suspend it, not to RAM but to disk:
$ dbus-send --system --print-reply --dest='org.freedesktop.UPower' \
    /org/freedesktop/UPower org.freedesktop.UPower.Hibernate
As you can see, for some reason it requires some duplication of information: the name org.freedesktop.UPower appears three times in that command line: in the destination , object path and interface member , whatever that could mean. Again, do not ask me why, I know nothing about that and I do not want to. Notes
  1. Actually, UPower does provide a command line tool called upower, but the only thing it does (monitoring power sources) is not really useful for that matter.

25 January 2013

Johannes Schauer: Bootstrappable Debian - New Milestone

This post is about the port bootstrap build ordering tool (naming suggestions welcome) which was started as a Debian Google Summer of Code project in 2012 and continued to be developed afterwards. Sources are available through gitorious. In the end of November 2012, I managed to put down an approximation algorithm to the feedback arc set problem which allowed to break the dependency graph into a directed acyclic graph with only few removed build dependencies. I wrote about this effort on our mailinglist but didnt mention it here because it was still too much of a proof-of-concept. Later, in January 2013, I mentioned the result of this algorithm in an email wookey and me wrote to debian-devel mailinglist. Many things happened since November 2012:

Processing pipeline instead of monolithic tools The tools I developed so far tried to accomplish everything by themselves, reusing functionality implemented in a central library. Therefor, if one wanted to try out even trivial new things, it mostly meant to hack some OCaml code. Pietro Abate suggested to instead develop smaller tools which could work independently of each other, would only execute one algorithm each and could easily be connected together in different ways to achieve different effects. This switch is now done and all functionality from the old tools is moved into a new toolset. The exchange format between the tools is either plain text files in deb822 control format (Packages/Sources files) or a dependency graph. The dependency graph is currently marshalled by OCaml but future versions should work with just passing a GraphML (an XML graph format) representation around. This new way of doing things seems close to the UNIX philosophy (each program does one thing well, data is stored as text, every program is a filter). For example the deb822 control output can easily be manipulated using grep-dctrl(1) and there exist many tools which can read, analyze and manipulate GraphML. It is a big improvement over the old, monolithic tools which did not allow to manipulate any intermediate result by external, existing tools. Currently, a shell script (native.sh) will execute all tools in a meaningful order, connecting them together correctly. The same tools will be used for a future cross.sh but they will be connected differently. I wrote about a first proposal of what the individual tools should do and how they should be connected in this email from which I also linked a confusing overview of the pipeline. This overview has recently been improved to be even more confusing and the current version of the lower half (the native part) now looks like this: native reduced Solid arrows represent a flow of binary packages, dottend arrows represent a flow of source packages, ovals represent a set of packages, boxes with rounded corners represent set operations, rectangular boxes represent filters. There is only one input to a filter, which is the arrow connected to the top of the box. Outgoing arrows from the bottom represent the filtered input. Ingoing arrows to either side are arguments to the filter and control how the filter behaves depending on the algorithm. I will explain this better once the pipeline proved to be less in flux. The pipeline is currently executed like this by native.sh.

Two new ways to break dependency cycles have been discovered So far, we knew of three ways to formally break dependency cycles:
  • remove build dependencies through build profiles
  • find out that the build dependency is only used to build arch:all packages and therefor put it into Build-Depends-Indep
  • cross compile some source packages
Two new methods can be added to the above:

Dependency graph definition changed Back in September when I was visiting irill, Pietro found a flaw in how the dependency graph used to be generated. He supplied a new definition of the dependency graph which does away with the problem he found. After fixing some small issues with his code, I changed all the existing algorithms to use the new graph definition. The old graph is as of today removed from the repository. Thanks to Pietro for supplying the new graph definition - I must still admit that my OCaml foo is not strong enough to have come up with his code.

Added complexity for profile built source packages As mentioned in the introduction, wookey and me addressed the debian-devel list with a proposal on necessary changes for an automated bootstrapping of Debian. During the discussiong, two important things came up which are to be considered by the dependency graph algorithms:
  • profile built source packages may not create all binary packages
  • profile built source packages may need additional build dependencies
Both things make it necessary to alter the dependency graph during the generation of a feedback arc set and feedback vertex set beyond the simple removal of edges. Luckily, the developed approximation algorithms can be extended to support such changes in the graph.

Different feedback arc set algorithms The initially developed feedback arc set algorithm is well suited to discover build dependency edges which should be dropped. It performs far worse when creating the final build order because it only considers edges by itself and not how many edges of a source package can be dropped by profile building it. The adjusted algorithm for generating a build order is more of a feedback vertex set algorithm because instead of greedily finding the edge with most cycles through it, it greedily finds the source package which would break most cycles if it was profile built.

Generating a build order with less profile built source packages After implementing all the features above I now feel more confident to publish the current status of the tools to a wider audience. The following test shows a run of the aforementioned ./native.sh shell script. Its final output is a list of source packages which have to be profile built and a build order. Using the resulting build order, starting from a minimal build system (essential:yes, build-essential and debhelper), all source packages will be compiled which are needed to compile all binary packages in the system. The result will therefor be a list of source and binary packages which fulfill the following property:
  • all binary packages can be built from the available source packages
  • all source packages can be built with the available binary packages
I called this a "reduceded distribution" in earlier posts. The interesting property of this specific selection is, that it contains the biggest problem set of Debian when bootstrapping it: a 900 to 1000 nodes big strongly connected component. Here is a visualization of the problem: hideous mess Source packages do not yet come with build profiles and the cross build situation can not yet be analyzed, so the following assumptions were made: The last point is about 14 build dependencies which were decided to be broken by the feedback arc set algorithm but for which other data sources did not indicate that they are actually breakable. Those 14 are dynamically generated by native.sh. If above assumptions should not be too far from the actual situation, then not more than 73 source packages have to be modified to bootstrap a reduced distribution. This reduced distribution even includes dependency-wise "big" packages like webkit, metacity, iceweasel, network-manager, tracker, gnome-panel, evolution-data-server, kde-runtime, libav and nautilus. By changing one line in native.sh one could easily develop a build order which generates gnome-desktop or really any given (meta-)package selection. All of native.sh takes only 80 seconds to execute on my system (Core i5, 2.5 GHz, singlethreaded). Here is the final build order which creates 2044 binary packages from 613 source packages.
  1. nspr, libio-pty-perl, libmcrypt, unzip, libdbi-perl, cdparanoia, libelf, c-ares, liblocale-gettext-perl, libibverbs, numactl, ilmbase, tbb, check, libogg, libatomic-ops, libnl($), orc($), libaio, tcl8.4, kmod, libgsm, lame, opencore-amr, tcl8.5, exuberant-ctags, mhash, libtext-iconv-perl, libutempter, pciutils, gperf, hspell, recode, tcp-wrappers, fdupes, chrpath, libbsd, zip, procps, wireless-tools, cpufrequtils, ed, libjpeg8, hesiod, pax, less, dietlibc, netkit-telnet, psmisc, docbook-to-man, libhtml-parser-perl, libonig, opensp($), libterm-size-perl, linux86, libxmltok, db-defaults, java-common, sharutils, libgpg-error, hardening-wrapper, cvsps, p11-kit, libyaml, diffstat, m4
  2. openexr, enca, help2man, speex, libvorbis, libid3tag, patch, openjade1.3, openjade, expat, fakeroot, libgcrypt11($), ustr, sysvinit, netcat, libirman, html2text, libmad, pth, clucene-core, libdaemon($), texinfo, popt, net-tools, tar, libsigsegv, gmp, patchutils($), dirac, cunit, bridge-utils, expect, libgc, nettle, elfutils, jade, bison
  3. sed, indent, findutils, fastjar, cpio, chicken, bzip2, aspell, realpath, dctrl-tools, rsync, ctdb, pkg-config($), libarchive, gpgme1.0, exempi, pump, re2c, klibc, gzip, gawk, flex-old, original-awk, mawk, libtasn1-3($), flex($), libtool
  4. libcap2, mksh, readline6, libcdio, libpipeline, libcroco, schroedinger, desktop-file-utils, eina, fribidi, libusb, binfmt-support, silgraphite2.0, atk1.0($), perl, gnutls26($), netcat-openbsd, ossp-uuid, gsl, libnfnetlink, sg3-utils, jbigkit, lua5.1, unixodbc, sqlite, wayland, radvd, open-iscsi, libpcap, linux-atm, gdbm, id3lib3.8.3, vo-aacenc, vo-amrwbenc, fam, faad2, hunspell, dpkg, tslib, libart-lgpl, libidl, dh-exec, giflib, openslp-dfsg, ppl($), xutils-dev, blcr, bc, time, libdatrie, libpthread-stubs, guile-1.8, libev, attr, libsigc++-2.0, pixman, libpng, libssh2, sqlite3, acpica-unix, acl, a52dec
  5. json-c, cloog-ppl, libverto, glibmm2.4, rtmpdump, libdbd-sqlite3-perl, nss, freetds, slang2, libpciaccess, iptables, e2fsprogs, libnetfilter-conntrack, bash, libthai, python2.6($), libice($), libpaper, libfontenc($), libxau, libxdmcp($), openldap($), cyrus-sasl2($), openssl, python2.7($)
  6. psutils, libevent, stunnel4, libnet-ssleay-perl, libffi, readline5, file, libvoikko, gamin, libieee1284, build-essential, libcap-ng($), lcms($), keyutils, libxml2, libxml++2.6, gcc-4.6($), binutils, dbus($), libsm($), libxslt, doxygen($)
  7. liblqr, rarian, xmlto, policykit-1($), libxml-parser-perl, tdb, devscripts, eet, libasyncns, libusbx, icu, linux, libmng, shadow, xmlstarlet, tidy, gavl, flac, dbus-glib($), libxcb, apr, krb5, alsa-lib
  8. usbutils, enchant, neon27, uw-imap, libsndfile, yasm, xcb-util, gconf($), shared-mime-info($), audiofile, ijs($), jbig2dec, libx11($)
  9. esound, freetype, libxkbfile, xvidcore, xcb-util-image, udev($), libxfixes, libxext($), libxt, libxrender
  10. tk8.4, startup-notification, libatasmart, fontconfig, libxp, libdmx, libvdpau, libdrm, libxres, directfb, libxv, libxxf86dga, libxxf86vm, pcsc-lite, libxss, libxcomposite, libxcursor, libxdamage, libxi($), libxinerama, libxrandr, libxmu($), libxpm, libxfont($)
  11. xfonts-utils, libxvmc, xauth, libxtst($), libxaw($)
  12. pmake, corosync, x11-xserver-utils, x11-xkb-utils, coreutils, xft, nas, cairo
  13. libedit, cairomm, tk8.5, openais, pango1.0($)
  14. ocaml, blt, ruby1.8, firebird2.5, heimdal, lvm2($)
  15. cvs($), python-stdlib-extensions, parted, llvm-2.9, ruby1.9.1, findlib, qt4-x11($)
  16. xen, mesa, audit($), avahi($)
  17. x11-utils, xorg-server, freeglut, libva
  18. jasper, tiff3, python3.2($)
  19. openjpeg, qt-assistant-compat, v4l-utils, qca2, jinja2, markupsafe, lcms2, sip4, imlib2, netpbm-free, cracklib2, cups($), postgresql-9.1
  20. py3cairo, pycairo, pam, libgnomecups, gobject-introspection($)
  21. gdk-pixbuf, libgnomeprint, gnome-menus, gsettings-desktop-schemas, pangomm, consolekit, vala-0.16($), colord($), atkmm1.6
  22. libgee, gtk+3.0($), gtk+2.0($)
  23. gtkmm2.4, poppler($), openssh, libglade2, libiodbc2, gcr($), libwmf, systemd($), gcj-4.7, java-atk-wrapper($)
  24. torque, ecj($), vala-0.14, gnome-keyring($), gcc-defaults, gnome-vfs($)
  25. libidn, libgnome-keyring($), openmpi
  26. mpi-defaults, dnsmasq, wget, lynx-cur, ghostscript, curl
  27. fftw3, gnupg, libquvi, xmlrpc-c, raptor, liboauth, groff, fftw, boost1.49, apt
  28. boost-defaults, libsamplerate, cmake, python-apt
  29. qjson, qtzeitgeist, libssh, qimageblitz, pkg-kde-tools, libical, dwarves-dfsg, automoc, attica, yajl, source-highlight, pygobject, pygobject-2, mysql-5.5($)
  30. libdbd-mysql-perl, polkit-qt-1, libdbusmenu-qt, raptor2, dbus-python, apr-util
  31. rasqal, serf, subversion($), apache2
  32. git, redland
  33. xz-utils, util-linux, rpm, man-db, make-dfsg, libvisual, cryptsetup, libgd2, gstreamer0.10
  34. mscgen, texlive-bin
  35. dvipng, luatex
  36. libconfig, transfig, augeas, blas, libcaca, autogen, libdbi, linuxdoc-tools, gdb, gpm
  37. ncurses, python-numpy($), rrdtool, w3m, iproute, gcc-4.7, libtheora($), gcc-4.4
  38. libraw1394, base-passwd, lm-sensors, netcf, eglibc, gst-plugins-base0.10
  39. libiec61883, qtwebkit, libvirt, libdc1394-22, net-snmp, jack-audio-connection-kit($), bluez
  40. redhat-cluster, gvfs($), pulseaudio($)
  41. phonon, libsdl1.2, openjdk-6($)
  42. phonon-backend-gstreamer($), gettext, libbluray, db, swi-prolog, qdbm, swig2.0($)
  43. highlight, libselinux, talloc, libhdate, libftdi, libplist, python-qt4, libprelude, libsemanage, php5
  44. samba, usbmuxd, libvpx, lirc, bsdmainutils, libiptcdata, libgtop2, libgsf, telepathy-glib, libwnck3, libnotify, libunique3, gnome-desktop3, gmime, glib2.0, json-glib, libgnomecanvas, libcanberra, orbit2, udisks, d-conf, libgusb
  45. libgnomeprintui, libimobiledevice, nautilus($), libbonobo, librsvg
  46. evas, wxwidgets2.8, upower, gnome-disk-utility, libgnome
  47. ecore, libbonoboui
  48. libgnomeui
  49. graphviz
  50. exiv2, libexif, lapack, soprano, libnl3, dbus-c++
  51. atlas, libffado, graphicsmagick, libgphoto2, network-manager
  52. pygtk, jackd2, sane-backends, djvulibre
  53. libav($), gpac($), ntrack, python-imaging, imagemagick, dia
  54. x264($), matplotlib, iceweasel
  55. strigi, opencv, libproxy($), ffms2
  56. kde4libs, frei0r, glib-networking
  57. kde-baseapps, kate, libsoup2.4
  58. geoclue, kde-runtime, totem-pl-parser, libgweather, librest, libgdata
  59. webkit
  60. zenity, gnome-online-accounts
  61. metacity, evolution-data-server
  62. gnome-panel
  63. tracker
The final recompilation of profile built source packages is omitted. Source packages marked with a ($) are selected to be profile built. All source packages listed in the same line can be built in parallel as they do not depend upon each other. This order looks convincing as it first compiles a multitude of source packages which have no or only few build dependencies lacking. Later steps allow fewer source packages to be compiled in parallel. The amount of needed build dependencies is highest in the source packages that are built last.

1 October 2012

Martin Pitt: Announcing D-Bus mocker library

I was working on writing tests for gnome-settings-daemon a week or so ago, and finally got blocked on being unable to set up upower/ConsoleKit/etc. the way I need them. Also, doing so needs root privileges, I don t want my test suite to actually suspend my machine, and using the real service is generally not suitable for test suites that are supposed to run during make check , in jhbuild, and the like these do not have the polkit privileges to do all that, and may not even have a system D-Bus running in the first place. So I wrote a little test_upower.py helper, then realized that I need another one for systemd/ConsoleKit (for the system idle property), also looked at the mock polkit in udisks and finally sat down for two days to generalize this and do this properly. The result is python-dbusmock, I just released the first tarball. With this you can easily create mock objects on D-Bus from any programming language with a D-Bus binding, or even from the shell. The mock objects look like the real API (or at least the parts that you actually need), but they do not actually do anything (or only some action that you specify yourself). You can configure their state, behaviour and responses as you like in your test, without making any assumptions about the real system status. When using a local system/session bus, you can do unit or integration testing without needing root privileges or disturbing a running system. The Python API offers some convenience functions like start_session_bus() and start_system_bus() for this, in a DBusTestCase class (subclass of the standard unittest.TestCase ). Surprisingly I found very little precedence here. There is a Perl module, but that s not particuarly helpful for test suites in C/Vala/Python. And there is Phil s excellent Bendy Bus, but this has a different goal: If you want to thoroughly test a particular D-BUS service, such as ensuring that it does the right thing, doesn t crash on bad input, etc., then Bendy Bus is for you (and python-dbusmock isn t). However, it is too much overhead and rather inconvenient if you want to test a client-side program and just need a few system services around it which you want to set up in different states for each test. You can use python-dbusmock with any programming language, as you can run the mocker as a normal program. The actual setup of the mock (adding objects, methods, properties, etc.) all happen via D-Bus methods on the org.freedesktop.DBus.Mock interface. You just don t have the convenience D-Bus launch API. The simplest possible example is to create a mock upower with a single Suspend() method, which you can set up like this from Python:
import dbus
import dbusmock
class TestMyProgram(dbusmock.DBusTestCase):
[...]
    def setUp(self):
        self.p_mock = self.spawn_server('org.freedesktop.UPower',
                                        '/org/freedesktop/UPower',
                                        'org.freedesktop.UPower',
                                        system_bus=True,
                                        stdout=subprocess.PIPE)
        # Get a proxy for the UPower object's Mock interface
        self.dbus_upower_mock = dbus.Interface(self.dbus_con.get_object(
            'org.freedesktop.UPower', '/org/freedesktop/UPower'),
            'org.freedesktop.DBus.Mock')
        self.dbus_upower_mock.AddMethod('', 'Suspend', '', '', '')
[...]
    def test_suspend_on_idle(self):
        # run your program in a way that should trigger one suspend call
        # now check the log that we got one Suspend() call
        self.assertRegex(self.p_mock.stdout.readline(), b'^[0-9.]+ Suspend$')
This doesn t depend on Python, you can just as well run the mocker like this:
python3 -m dbusmock org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower
and then set up the mocks through D-Bus like
gdbus call --system -d org.freedesktop.UPower -o /org/freedesktop/UPower \
      -m org.freedesktop.DBus.Mock.AddMethod '' Suspend '' '' ''
If you use it with Python, you get access to the dbusmock.DBusTestCase class which provides some convenience functions to set up and tear down local private session and system buses. If you use it from another language, you have to call dbus-launch yourself. Please see the README for some more details, pointers to documentation and examples. Update: You can now install this via pip from PyPI or from the daily builds PPA. Update 2: Adjusted blog entry for version 0.0.3 API, to avoid spreading now false information too far.

28 July 2012

Vincent Bernat: Switching to the awesome window manager

I have happily used FVWM as my window manager for more than 10 years. However, I recently got tired of manually arranging windows and using the mouse so much. A window manager is one of the handful pieces of software getting in your way at every moment which explains why there are so many of them and why we might put so much time in it. I decided to try a tiling window manager. While i3 seemed pretty hot and powerful (watch the screencast!), I really wanted something configurable and extensible with some language. So far, the common choices are: I chose awesome, despite the fact that StumpWM vote for Lisp seemed a better fit (but it is more minimalist). I hope there is some parallel universe where I enjoy StumpWM. Visually, here is what I got so far: awesome dual screen setup

Awesome configuration Without a configuration file, awesome does nothing. It does not come with any hard-coded behavior: everything needs to be configured through its Lua configuration file. Of course, a default one is provided but you can also start from scratch. If you like to control your window manager, this is somewhat wonderful. awesome is well documented. The wiki provides a FAQ, a good introduction and the API reference is concise enough to be read from the top to the bottom. Knowing Lua is not mandatory since it is quite easy to dive into such a language. I have posted my configuration on GitHub. It should not be used as is but some snippets may be worth to be stolen and adapted into your own configuration. The following sections put light on some notable points.

Keybindings Ten years ago was the epoch of scavanger hunts to recover IBM Model M keyboards from waste containers. They were great to type on and they did not feature the infamous Windows keys. Nowadays, this is harder to get such a keyboard. All my keyboards now have Windows keys. This is a major change with respect to configure a window manager: the left Windows key is mapped to Mod4 and is usually unused by most applications and can therefore be dedicated to the window manager. The main problem with the ability to define many keybindings is to remember the less frequently used one. I have monkey-patched awful.key module to be able to attach a documentation string to a keybinding. I have documented the whole process on the awesome wiki. awesome online help

Quake console A Quake console is a drop-down terminal which can be toggled with some key. I was heavily relying on it in FVWM. I think this is still a useful addition to any awesome configuration. There are several possible solutions documented in the awesome wiki. I have added my own1 which works great for me. Quake console

XRandR XRandR is an extension which allows to dynamically reconfigure outputs: you plug an external screen to your laptop and you issue some command to enable it:
$ xrandr --output VGA-1 --auto --left-of LVDS-1
awesome detects the change and will restart automatically. Laptops usually come with a special key to enable/disable an external screen. Nowadays, this key does nothing unless configured appropriately. Out of the box, it is mapped to XF86Display symbol. I have associated this key to a function that will cycle through possible configurations depending on the plugged screens. For example, if I plug an external screen to my laptop, I can cycle through the following configurations:
  • only the internal screen,
  • only the external screen,
  • internal screen on the left, external screen on the right,
  • external screen on the left, internal screen on the right,
  • no change.
The proposed configuration is displayed using naughty, the notification system integrated in awesome. Notification of screen reconfiguration

Widgets I was previously using Conky to display various system-related information, like free space, CPU usage and network usage. awesome comes with widgets that can fit the same use. I am relying on vicious, a contributed widget manager, to manage most of them. It allows one to attach a function whose task is to fetch values to be displayed. This is quite powerful. Here is an example with a volume widget:
local volwidget = widget(  type = "textbox"  )
vicious.register(volwidget, vicious.widgets.volume,
         '<span font="Terminus 8">$2 $1%</span>',
        2, "Master")
volwidget:buttons(awful.util.table.join(
             awful.button(   , 1, volume.mixer),
             awful.button(   , 3, volume.toggle),
             awful.button(   , 4, volume.increase),
             awful.button(   , 5, volume.decrease)))
You can also use a function to format the text as you wish. For example, you can display a value in red if it is too low. Have a look at my battery widget for an example. Various widgets

Miscellaneous While I was working on my awesome configuration, I also changed some other desktop-related bits.

Keyboard configuration I happen to setup all my keyboards to use the QWERTY layout. I use a compose key to input special characters like . I have also recently use Caps Lock as a Control key. All this is perfectly supported since ages by X11 I am also mapping the Pause key to XF86ScreenSaver key symbol which will in turn be bound to a function that will trigger xautolock to lock the screen. Thanks to a great article about extending the X keyboard map with xkb, I discovered that X was able to switch from one layout to another using groups2. I finally opted for this simple configuration:
$ setxkbmap us,fr '' compose:rwin ctrl:nocaps grp:rctrl_rshift_toggle
$ xmodmap -e 'keysym Pause = XF86ScreenSaver'
I switch from us to fr by pressing both left Control and left Shift keys.

Getting rid of most GNOME stuff Less than one year ago, to take a step forward to the future, I started to heavily rely on some GNOME components like GNOME Display Manager, GNOME Power Manager, the screen saver, gnome-session, gnome-settings-daemon and others. I had numerous problems when I tried to setup everything without pulling the whole GNOME stack. At each GNOME update, something was broken: the screensaver didn t start automatically anymore until a full session restart or some keybindings were randomly hijacked by gnome-settings-daemon. Therefore, I have decided to get rid of most of those components. I have replaced GNOME Power Manager with system-level tools like sleepd and the PM utilities. I replaced the GNOME screensaver with i3lock and xautolock. GDM has been replaced by SLiM which now features ConsoleKit support3. I use ~/.gtkrc-2.0 and ~/.config/gtk-3.0/settings.ini to configure GTK+. The future will wait.

Terminal color scheme I am using rxvt-unicode as my terminal with a black background (and some light transparency). The default color scheme is suboptimal on the readability front. Sharing terminal color schemes seems a popular activity. I finally opted for the derp color scheme which brings a major improvement over the default configuration. Comparison of terminal color schemes I have also switched to Xft for font rendering using DejaVu Sans Mono as my default font (instead of fixed) with the following configuration in ~/.Xresources:
Xft.antialias: true
Xft.hinting: true
Xft.hintstyle: hintlight
Xft.rgba: rgb
URxvt.font: xft:DejaVu Sans Mono-8
URxvt.letterSpace: -1
The result is less crisp but seems a bit more readable. I may switch back in the future. Comparison of terminal fonts

Next steps My reliance to the mouse has been greatly reduced. However, I still need it for casual browsing. I am looking at luakit a WebKit-based browser extensible with Lua for this purpose.

  1. The console gets its own unique name. This allows awesome to reliably detect when it is spawned, even on restart. It is how the Quake console works in the mod of FVWM I was using.
  2. However, the layout is global, not per-window. If you are interested by a per-window layout, take a look at kbdd.
  3. Nowadays, you cannot really survive without ConsoleKit. Many PolicyKit policies do not rely on groups any more to grant access to your devices.

30 June 2012

Bernhard R. Link: ACPI power button for the rest of us

The acpi-support maintainer unfortunately decided 2012-06-21 that having some script installed by a package to cleanly shut down the computer should not be possible without having consolekit and thus dbus installed. So (assuming this package will migrate to wheezy which it most likely will tomorrow) with wheezy you will either have to write your own event script or install consolekit and dbus everywhere. You need two files. You need one in /etc/acpi/events/, for example a /etc/acpi/events/powerbtn:
event=button[ /]power
action=/etc/acpi/powerbtn.sh
Which causes a power-button even to call a script /etc/acpi/powerbtn.sh, which you of course also need:
#!/bin/sh
/sbin/shutdown -h -P now "Power button pressed"
You can also name it differently, but /etc/acpi/powerbtn.sh has the advantage that the script from acpi-support-base (in case it was only removed and not purged) does not call shutdown itself if it is there. (And do not forget to restart acpid, otherwise it does not know about your event script yet). For those too lazy I've also prepared a package acpi-support-minimal, which only contains those scripts (and a postinst to restart acpid to bring it into effect with installation), which can be get via apt-get using
deb http://people.debian.org/~brlink/acpi-minimal wheezy-acpi-minimal main
deb-src http://people.debian.org/~brlink/acpi-minimal wheezy-acpi-minimal main
or directly from http://people.debian.org/~brlink/acpi-minimal/pool/main/a/acpi-support-minimal/. Sadly the acpi-support maintainer sees no issue at all and ftp-master doesn't like so tiny packages (which is understandable but means the solution is more than a apt-get away).

25 April 2012

Vincent Bernat: XBMC Eden on Debian Wheezy

I bought some HTPC a few years ago to run XBMC, a neat media center solution. At the time, to avoid any problems, I installed it on top of a minimal Ubuntu Lucid installation with the official packages from the team XBMC. Recently, XBMC Eden has been released and XBMC has landed into Debian unstable. It was a good occasion to make the switch. Unofficial XBMC logo for Eden TL;DR: Installing XBMC on Debian Wheezy is quite easy: it almost works out of the box. The big difficulty is the configuration of the remote control: either it works as you expect or you will have to scratch your head over the pile of layers needed to work with a remote control. The configuration of my HTPC is as follows:

Installation

Installing Debian Wheezy Installing Debian Wheezy2 is pretty easy. Nowadays, getting a bootable USB key from a netinst image of Debian Installer for Wheezy is simplified:
$ sudo dd if=debian-testing-i386-netinst.iso \
>         of=/dev/disk/by-id/usb...
The installation was smooth with the exception of GRUB which was unable to install itself on the disk. This is a known bug when dealing with LVM and it comes with a simple workaround. I hope it will be corrected in time for Wheezy release. While this has little to do with the installation of XBMC, I wanted to test systemd which may become the default init in Debian (at least in Debian GNU/Linux). From README.Debian:
systemd can be installed alongside sysvinit and will not change the behaviour of the system out of the box. This is intentional. To test systemd, add init=/bin/systemd to the kernel command line and then rebooting, or install the systemd-sysv package.
The final system boots in about 15 seconds.

Configuring X Because video decoding in nouveau driver is still a work in progress, the use of the proprietary NVIDIA drivers is mandatory to be able to watch high resolution videos. Therefore, /etc/apt/sources.list should be completed with contrib and non-free repository. Then, you can install the appropriate packages: xserver-xorg-video-nvidia, nvidia-vdpau-driver and xserver-xorg. Here is my /etc/X11/xorg.conf.d/nvidia.conf:
Section "Device"
    Identifier     "NVidia ION"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    Option         "HWCursor" "False"
    Option         "NoFlip" "False"
    Option         "FlatPanelProperties" "Scaling = Native"
    Option         "DynamicTwinView" "False"
    Option         "ConnectedMonitor" "DFP-1"
    Option         "CustomEDID" "DFP-1:/etc/X11/edid.bin"
    Option         "NoLogo" "True"
EndSection
Section "Extensions"
    Option "Composite" "false"
EndSection
The CustomEDID option allows the driver to get an appropriate EDID even when the AV receiver is off. You can get yours, free of charge, with get-edid from read-edid package.

Installing XBMC Thanks to the work of Andr s Mej a, XBMC is now available in Debian Wheezy. To install it, just type aptitude install xbmc. I have dropped the following xbmc.service in /etc/systemd/system directory:
[Unit]
Description = XBMC media center
After = syslog.target
[Service]
User = xbmc
Group = xbmc
Type = simple
ExecStart = /usr/bin/xinit /usr/bin/xbmc-standalone -- :0
Restart = on-failure
[Install]
WantedBy = multi-user.target
Enable this service on boot with systemctl enable xbmc.service. You need to allow xbmc user to run X. The simplest way is to run dpkg-reconfigure -plow x11-common and to allow anybody to run X. sudo may be an alternative.

Configuration

Sound While I wanted to use PulseAudio, I want the AV receiver to be able to upmix stereo streams itself. With PulseAudio, it would always receive a 6-channel signal. Therefore, I directly use ALSA. First, unmute the appropriate outputs:
$ amixer scontrols   grep IEC958
Simple mixer control 'IEC958',0
Simple mixer control 'IEC958 Default PCM',0
Simple mixer control 'IEC958',1
$ amixer sset 'IEC958',0 unmute
$ amixer sset 'IEC958 Default PCM',0 unmute
$ amixer sset 'IEC958',1 unmute
$ sudo systemctl stop alsa-utils.service
The order of channels is incorrect. With the following /etc/asound.conf, we declare a new output, hdmi2, with a different mapping:
pcm.hdmi2  
  type asym
  playback.pcm  
    type plug
    slave.pcm "remap-surround51"
   
 
pcm.!remap-surround51  
  type route
  slave.pcm "hdmi"
  ttable  
    0.0= 1
    1.1= 1
    2.4= 1
    3.5= 1
    4.2= 1
    5.3= 1
   
 
In XBMC, this output should be used instead of the default one. hdmi should still be used for passthrough. To check if each speaker is mapped correctly, one can use speaker-test -D hdmi2 -c 6.

LCD display The LCD display integrated into the SoundGraph iMON is supported by the imon kernel module and the lcdproc package. I have only modified a few lines of /etc/LCDd.conf to make it work:
[server]
Driver=imonlcd
ServerScreen=off
[imonlcd]
Protocol=1
OnExit=2
Contrast=400

Remote control This is the most difficult part. I have a Logitech Harmony remote which is a great universal remote. Its support in Linux is acceptable: you can configure through Logitech website and use congruity to push the new configuration.

Remote controls and Linux Before Linux 2.6.36, most remote controls would need LIRC to work:
  • The driver receives the signal from the IR receiver and make it available through /dev/lirc.
  • lircd, with the help of a configuration file describing the protocol used by the remote control, will read the signal and turn it into the appropriate LIRC code.
  • XBMC connects to lircd and receives incoming LIRC codes. It will translate them to an XBMC command. This translation is specified in Lircmap.xml.
  • XBMC maps each command to an action (like Play, Fullscreen, ) using a keymap. This keymap can handle commands received by a remote control, but also by a keyboard, a mouse or a joystick.
Since Linux 2.6.36, remote controls will be mapped as a generic input device (just like a keyboard):
  • The driver receives the signal from the IR receiver.
  • The signal will be handled by a decoder. The configuration of this decoder is done in userland by ir-keytable. The decoder will turn the signal into the appropriate event (usually, some keypress).
  • X will listen to those events and turn them into X key events.
  • XBMC will receive them and use the appropriate keymap to turn them into actions.
And to add more complexity to the mix, in this last case, you can still use LIRC: lircd will listen to events generated by the kernel and turn them into LIRC codes. This can be very confusing. Moreover, the SoundGraph iMON IR receiver accepts two IR protocols: the iMON protocol and the RC-6 one. The Linux driver accepts both of them but uses the first one by default. The RC-6 protocol is the protocol used by many MCE remote controls. I hope you are still with me here.

The easy way To get a reasonable configuration out of the box, here is how to configure each layer:
Logitech Harmony remote
Configure it as a Microsoft branded Media Center PC: Windows Media Center SE.
iMON IR receiver
It must use RC-6 protocol. See below for more details.
LIRC
In /etc/lirc/hardware.conf, put DEVICE=/dev/input/by-id/usb-15c2_0038-event-if00 and DRIVER=devinput. In /etc/lirc/lircd.conf, just put include "/usr/share/lirc/remotes/devinput/lircd.conf.devinput".
XBMC
With the previous bits done, it should just work out of the box.
To switch to RC-6 protocol, install the ir-keytable package and use the following commands:
$ sudo modprobe rc-imon-mce
$ sudo ir-keytable -s rc0 -p rc-6 -c -w /lib/udev/rc_keymaps/imon_mce
Read imon_mce table
Old keytable cleared
Wrote 77 keycode(s) to driver
Protocols changed to RC-6
To make the change permanent, add the rc-imon-mce module to /etc/modules and create /etc/udev/rules.d/90-imon.rules with the following content:
# Override the keytable for iMON
ACTION=="add change", SUBSYSTEM=="rc", DRV_NAME="imon", \
   RUN+="/usr/bin/ir-keytable -s $name -p rc-6 -c -w /lib/udev/rc_keymaps/imon_mce"

The hard way Now, you may want to bind custom actions to some (physical or virtual) buttons. Basically, you are left with two solutions:
  1. Start from the basic configuration with LIRC and add more buttons at each levels (there are five of them!).
  2. Remove LIRC and start with the Logitech Harmony acting as a Microsoft MCE keyboard.
The first option can be quite difficult. You need to find an unused code for the Logitech Harmony. You can try to make it learn a new code if you have some RC-6 remote control. Then, you need to ensure that this code will be present in the keytable used by ir-keytable. If not, you need to add it. That s not easy since you need a to enable some debug stuff in the kernel to find the appropriate scancode. After that, the code needs to be translated in lircd.conf. You will then have to translate it again in Lircmap.xml. At least, you need to add it to a keymap in XBMC. The other way is not ideal but seems less cumbersome. The first step is to configure the Logitech Harmony as a Microsoft MCE keyboard: it has a lot of available keys. Because of the lack of multimedia keys, let s match the keyboard configuration of XBMC:
Button Command Button Command
Channel Down PageDown Stop X
Channel Up PageUp Skip back Comma
Prev Backspace Skip forward .
Up DirectionUp Play P
Down DirectionDown Rewind R
Left DirectionLeft Fast forward F
Right DirectionRight Star Delete
OK Enter Pound W
Menu C Red F1
Exit Esc Green F2
Guide Tab Yellow F3
Info I Blue F4
Unfortunately, the keytables provided with ir-keytable are not complete enough. I have built a more complete table3. With this table and the bindings described above, most functions will work out of the box without LIRC. Additional keys can be configured in a dedicated keymap4. Here is an excerpt of mine:
<keymap>
 <global>
  <keyboard>
    <end>XBMC.ShutDown()</end>
    <f1>XBMC.ActivateWindow(MusicLibrary)</f1>
    <f2>XBMC.ActivateWindow(Videos,TvShowTitles)</f2>
    <f3>XBMC.ActivateWindow(Videos,MovieTitles)</f3>
    <f4>XBMC.ActivateWindow(Weather)</f4>
  </keyboard>
 </global>
 <FullscreenVideo>
  <keyboard>
   <opensquarebracket>SubtitleDelayMinus</opensquarebracket>
   <closesquarebracket>SubtitleDelayPlus</closesquarebracket>
   <f6>xbmc.runscript(script.xbmc.subtitles)</f6>
  </keyboard>
 </FullscreenVideo>
</keymap>

FTP Instead of using SSH, I prefer to drop new files with anonymous FTP. vsftpd fits this purpose. Here is my configuration file:
listen=YES
xferlog_enable=YES
use_localtime=YES
setproctitle_enable=YES
secure_chroot_dir=/var/run/vsftpd/empty
nopriv_user=ftp
ftpd_banner=XBMC
hide_ids=YES
ftp_username=xbmc
anon_umask=022
anon_root=/home/xbmc/media
anonymous_enable=YES
write_enable=YES
anon_upload_enable=YES
anon_world_readable_only=YES
It is currently not compatible with systemd (see bug #670308). I have removed the symlink in /etc/rc2.d and I have used the following unit file:
[Unit]
Description=Vsftpd ftp daemon
After=syslog.target network.target
[Service]
Type=simple
ExecStart=/usr/sbin/vsftpd /etc/vsftpd.conf
ExecReload=/bin/kill -HUP $MAINPID
ExecStartPre=-/bin/mkdir -p /var/run/vsftpd/empty
[Install]
WantedBy=multi-user.target

Miscellaneous
  1. In /etc/default/grub, reduce TIMEOUT to 0 to shorten the boot time.
  2. Enabling dirty regions can help speed up XBMC.
  3. aptitude install upower pm-utils to be able to shutdown/suspend from XBMC. Since XBMC was configured to be started outside any session, you need to explicitely give the appropriate rights by creating the following /var/lib/polkit-1/localauthority/50-local.d/xbmc.pkla:
    [Actions for xbmc user]
    Identity=unix-user:xbmc
    Action=org.freedesktop.upower.*;org.freedesktop.consolekit.system.*
    ResultAny=yes
    ResultInactive=yes
    ResultActive=yes
    

  1. The readibility of the LCD screen is very bad. You should look at the VFD version. The IR receiver reception is poor. The provided remote control is a joke.
  2. Debian Wheezy is not yet released. If you are unfamiliar with Debian, it may be cumbersome to maintain it until the freeze happens in a few months.
  3. Some keys are missing from the provided table. For example, there is no exclamation mark. While there is a scan code for such a key in RC-6 protocol, there is no appropriate key code to translate to: on a QWERTY keyboard, the exclamation mark is on the same key as the number 1. It is possible to map it to some other key code, but the mapping would have been difficult to use.
  4. For example, in ~/.xbmc/userdata/keymaps/harmony.xml.

1 June 2011

Vincent Bernat: GNOME Power Manager without GNOME desktop

When I installed my new laptop, I decided to switch from sleepd to GNOME Power Manager (GPM). The rationale behind this decision was to get screen dimming for free while keeping other features because GPM uses UPower which uses pm-suspend and pm-powersave behind the scene. This means that it is easy to execute scripts on suspend or when the AC is unplugged by putting them in /etc/pm. I don t use a full GNOME desktop. My desktop is running FVWM which is just a window manager. However, I already use some parts of the GNOME environment:

What s working It happens that most of the features just do not work. However, suspend when closing the lid works fine. The icon in the systray works fine too (but there is a small bug). The screen dimming feature on idle also works (but there are annoying bugs with it). The visual feedback when pressing brightness keys works too.

What s not working It seems that I am not the only one to have problem with GPM: there are currently 115 bugs opened in the Debian BTS. If you want to get some debug output from gnome-power-manager, run it with --verbose flag. --debug flag does nothing (and supersedes --verbose).

Nothing happens when pressing the power button I have configured GPM to ask me what to do when I press the power button. But when I press the button, nothing happens. Looking at the source, here is the snippet of code that is executed:
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if (policy == GPM_ACTION_POLICY_INTERACTIVE)  
    GpmSession *session;
    egg_debug ("logout, reason: %s", reason);
    session = gpm_session_new ();
    gpm_session_logout (session);
    g_object_unref (session);
 
In fact, this is not GPM that will ask you the question, but GNOME session manager because GPM triggers logout. If you don t run a full GNOME session, nothing will happen. My workaround is just to set the action to Suspend .

Does not sleep when idle GPM is configured to go to sleep after 2 hours on AC or 30 minutes on battery. This does not work for me because idle detection is delegated to external programs. There are four variables used by GPM to determine if we are idle:
  • session_idle which is the idle hint from ConsoleKit,
  • idle_inhibited which is set when another program asks to disable idle detection (a video player which does not want the screen to be dimmed),
  • suspend_inhibited which means a program do not want we going to sleep (a music player for example)
  • x_idle which tells if X is idle or not (someone is moving the mouse or typing on the keyboard).
To allow GPM to suspend when we are idle, x_idle and session_idle must be true while suspend_inhibited and idle_inhibited must be false. For screen dimming purpose, you just need to have x_idle set to true and idle_inhibited set to false. Currently, only GNOME Screensaver seems to tell ConsoleKit if the session is idle or not. XScreenSaver does not contain anything about this. I am using xautolock with xlock and I am pretty sure they won t tell GPM if I am idle. You can use dbus-send to circumvent this problem:
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$ dbus-send --system --dest=org.freedesktop.ConsoleKit \
>   --type=method_call --print-reply --reply-timeout=2000 \
>   /org/freedesktop/ConsoleKit/Manager \
>   org.freedesktop.ConsoleKit.Manager.GetCurrentSession
method return sender=:1.6 -> dest=:1.106 reply_serial=2
   object path "/org/freedesktop/ConsoleKit/Session1"
$ dbus-send --system --dest=org.freedesktop.ConsoleKit \
>   --type=method_call --print-reply --reply-timeout=2000 \
>   /org/freedesktop/ConsoleKit/Session1 \
>   org.freedesktop.ConsoleKit.Session.SetIdleHint boolean:true          
method return sender=:1.6 -> dest=:1.108 reply_serial=2
While I understand what is the rationale behind those choices (no code duplicate and allowing external programs to hinder power management), it lacks some fallback in case you don t use GNOME Screensaver (which is the key component here). I first though this was bug #594706 but this is not the case. I have opened (and closed) bug #628755. UPDATED: Jump to the conclusion for an updated solution for this problem.

Brightness is not restored to the previous value after idle When GPM undims the screen, it does not restore the previous value. It seems to be bug #617310 which is marked as fixed in upstream. I did not investigate it.

Wrong number of batteries reported I only have one battery but after one suspend/resume cycle, GPM thinks I have two. Maybe this is a bug of UPower. Maybe this is bug #606434. I did not investigate it. Maybe there is an happy interaction with bug #456280.

Inability to set configure actions when the UPS runs out of battery This is bug #390602. In addition to laptop batteries, UPower also supports UPS. In this case, GPM displays a special icon to tell if the UPS is fully charged. However, there is no possibility to execute special actions when the UPS is unplugged, like hibernate after 10 minutes or something like this. This seems to be a problem with the interface because looking with gconftool-2, we can spot variables like low_ups or critical_ups which allow to set actions when the UPS is almost out of battery. Moreover, the UPS icon only displays after one suspend/resume cycle but I am too lazy to report and debug this issue. Since, the icon disappear if I restart GPM, I am confident that the bug is in GPM.

Conclusion The conclusion is that GPM is not really that buggy but it really needs to be run in a full-blown GNOME desktop. The main problem is not really GPM. New technologies like UPower and ConsoleKit get pushed by freedesktop.org initiative, they get implemented by GNOME (and, I suppose, KDE) because they have tons of people following the appropriate mailing lists and any alternative just gets crushed by all those unpublicized changes. UPDATED: I got several helpful comments about this problem. There are two possible solutions:
  1. Use xfce4-power-manager. It handles brightness control in a better way and don t need an external program to tell when the current session is idle. It still needs a session manager to ask what to do when using the power button. The drawback to this solution is that you start to pull another desktop environment into your environment. You had some parts of GNOME and now you have some parts of XFCE. This solution was proposed by Sylvain Collilieux.
  2. Use gnome-session, gnome-screensaver and keep gnome-power-manager. As pointed by Julien Valroff, gnome-screensaver needs gnome-session to detect idleness. However, gnome-session starts a whole GNOME desktop. Again, there are two solutions. The first one is to replace gnome-session by something lighter implementing the bare minimum to make gnome-screensaver happy. Another suggestion is to configure gnome-session to start your favorite environment.
I start mine from ~/.xsession and here is what I have added at the top of it:
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# If not done, restart ourself with gnome-session
if [ -z "$SESSION_MANAGER" ]; then
    [ -d ~/.config/autostart ]   mkdir ~/.config/autostart
    rm -f ~/.config/autostart/*
    cat <<EOF > ~/.config/autostart/xsession.desktop
[Desktop Entry]
Name=Xsession
Comment=Start .xsession
Exec=$(readlink -f $0)
Type=Application
X-GNOME-Autostart-enabled=true
EOF
    exec gnome-session --autostart=$HOME/.config/autostart
fi
# Otherwise, keep starting stuff
# [...]
exec fvwm-crystal

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