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Les instructions pour Linux fournies sur le site officiel ne fonctionnent pas pour moi (Maverick / Ubuntu 10.10 desktop amd64).

Il semble qu'il ne soit toujours pas possible d'importer des fichiers sauvegardés dans une version 32 bit de VaudTax avec la version 64 bits, et vice-versa (crash de VaudTax avec une erreur cryptique [1]). Deux options, soit recommencer sa déclaration sans importer les données de l'année précédente, soit faire tourner VaudTax avec une JVM 32-bits ([2]). Pour l'instant j'ai toujours opté pour la deuxième variante. Jusqu'à l'année passée (VaudTax2009), on pouvait télécharger une version incluant une JVM (32-bits), cette option n'est plus disponible mais il est toujours possible d'arriver au même résultat :

1ère étape, avant de commencer le processus d'installation :

$ sudo update-alternatives --config java
There are 3 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                                       Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-6-openjdk/jre/bin/java    1061      auto mode
  1            /usr/lib/jvm/ia32-java-6-sun/jre/bin/java   63        manual mode
  2            /usr/lib/jvm/java-6-openjdk/jre/bin/java    1061      manual mode
  3            /usr/lib/jvm/java-6-sun/jre/bin/java        63        manual mode

Press enter to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/lib/jvm/ia32-java-6-sun/jre/bin/java to provide /usr/bin/java (java) in manual mode.

(si l'option JVM 32-bits n'apparaît pas, il faut d'abord installer le paquet ia32-sun-java6-bin)

Une fois VaudTax installé, il faut télécharger et décompacter xulrunner :

$ cd $HOME/VaudTax2010
$ wget http://releases.mozilla.org/pub/mozilla.org/xulrunner/releases/1.9.2.16/runtimes/xulrunner-1.9.2.16.en-US.linux-i686.tar.bz2
$ tar -xpf xulrunner-*

Finalement, il faut encore modifier le fichier VaudTax2010 en ajoutant ces deux lignes juste après `VM_SEARCH_PATH="$PATH"' :

export MOZILLA_FIVE_HOME=$HOME/VaudTax2010/xulrunner
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:${MOZILLA_FIVE_HOME}

Note : une fois VaudTax2010 installé, on peut exécuter à nouveau "sudo update-alternatives --config java" pour rétablir la configuration initiale - les paramètres sont en effet enregistrés dans le fichier VaudTax2010.lax


[1]

The program 'SWT' received an X Window System error.
This probably reflects a bug in the program.
The error was 'RenderBadPicture (invalid Picture parameter)'.
  (Details: serial 5455 error_code 161 request_code 149 minor_code 7)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

[2] la troisième variante serait d'étudier le format de fichier produit par chacune des versions pour créer un outil de conversion

1. create and enable a "regular" swap partition (fdisk / mkswap / swapon)

2. install ecryptfs-utils and run ecryptfs-setup-swap

sudo apt-get install ecryptfs-utils
sudo ecryptfs-setup-swap



                

In Ubuntu Karmic (and possibly Jaunty ?), when you install libsane, it adds a file /lib/udev/rules.d/40-libsane.rules which contains rules that match on supported scanners and set the environment variable "libsane_matched" to "yes".

This in turn triggers the following in /lib/udev/rules.d/70-acl.rules:

# USB scanners
ENV{libsane_matched}=="yes", ENV{ACL_MANAGE}="1"

<snip>

# apply ACL for all locally logged in users
LABEL="acl_apply", ENV{ACL_MANAGE}=="?*", TEST=="/var/run/ConsoleKit/database", \
  RUN+="udev-acl --action=$env{ACTION} --device=$env{DEVNAME}"

In the end, the result is that an ACL is created for the device, which allows locally logged in users to use it (read/write permission). eg for my scanner:

~# lsusb
Bus 001 Device 005: ID 04b8:011c Seiko Epson Corp. Perfection 3200
~# ls -l /dev/bus/usb/001/005
crw-rw-r--+ 1 root root 189, 4 2009-12-28 00:11 /dev/bus/usb/001/005
~# getfacl /dev/bus/usb/001/005
getfacl: Removing leading '/' from absolute path names
# file: dev/bus/usb/001/005
# owner: root
# group: root
user::rw-
user:crox:rw-
group::rw-
mask::rw-
other::r--
~#

However, I also wanted to allow access to the scanner from other workstations through saned. In older Ubuntu versions, you could just add saned (or whatever user the service runs as) to the scanner group. This no longer works since the device belongs to root:root, and ACLs are added for specific users. The solution that works for me is to create a file /etc/udev/rules.d/99-sane-group.rules with the following contents:

# change group to scanner for sane devices
ENV{libsane_matched}=="yes", GROUP="scanner"

Then you just need to run

sudo udevadm trigger

and the group of the device magically changes to scanner.

Of course you could also add a similar rule specifically for a certain device instead, in my case this would work too:

ATTRS{idVendor}=="1d6b", ATTRS{idProduct}=="0002", GROUP="scanner"

To check that it worked, run the following:

sudo su -s /bin/bash -c 'scanimage -L' saned

Faced with a noisy Dell Precision 490 computer running Ubuntu Karmic, I found an easy way to reduce the noise level to an acceptable threshold. (fancontrol did not help since it seems not to be compatible with the chipset used by Dell at least on this computer.)

Step 1, install i8kutils:

sudo apt-get install i8kutils

Step 2, add i8k to /etc/modules:

sudo sh -c 'echo i8k >> /etc/modules'

Step 3, edit /etc/default/i8kmon so that it looks like this:

# /etc/default/i8kmon



# Change to one enable i8kmon

ENABLED=1

I8KMON_ARGS="--daemon --nouserconfig --auto"

Step 4, reboot and enjoy!

There is actually at least one very straightforward way to install Ubuntu Netbook Remix without a USB key, without even downloading the image, over the network.

Just follow the instructions in my previous article to get a working Ubuntu Installer over PXE. By default this installer will only setup a very minimal Ubuntu system, without any server or desktop packages.

At some point during the installation, you are offered the possibility to install additional software packages. At this stage you can just tick the box in front of "Ubuntu Network Remix" and that's it! You don't need to select any other package (eg Ubuntu Desktop) for a fully working UNR install. Personally I added "OpenSSH Server" because I want to be able to login remotely. Of course you could also add those packages later on.