Xubuntu 11.10: FGLRX update fails

This is a more complete, more useful and precise verson of the bug report. The older one can be deleted.

Status changed to 'Confirmed' because the bug affects multiple users.

I am affected by the exact same issue on Ubuntu, this is not Xubuntu related. I tried to install fglrx-updates from synaptics and it works fine, except that the tool for proprietary drivers shows that no proprietary drivers are active... and trying to install from that tool results in an error. My jockey logfile is very similar to this one.

When I try to install it manually, it tells me that it is already installed,
but when I make a search on fglrx, nothing is installed.

eric@bilbo:~$ sudo apt-get install fglrx-amdcccle-updates fglrx-updates
Lecture des listes de paquets... Fait
Construction de l'arbre des dépendances
Lecture des informations d'état... Fait
fglrx-amdcccle-updates est déjà la plus récente version disponible.
fglrx-amdcccle-updates passé en « installé manuellement ».
fglrx-updates est déjà la plus récente version disponible.
0 mis à jour, 0 nouvellement installés, 0 à enlever et 0 non mis à jour.

eric@bilbo:~$ sudo aptitude search fglrx
c fglrx - Video driver for the AMD graphics accelerators
p fglrx-amdcccle - Catalyst Control Center for the AMD graphics accelerators
p fglrx-amdcccle-updates - Catalyst Control Center for the AMD graphics accelerators
v fglrx-control -
v fglrx-control -
p fglrx-dev - Video driver for the AMD graphics accelerators (devel files)
v fglrx-driver -
v fglrx-driver -
v fglrx-driver-dev ...

Truc de OUF
«aptitude search» show me that nothing is installed
But «aptitude show fglrx-updates» tell me that the package is already installed

eric@bilbo:~$ sudo aptitude search fglrx
p fglrx - Video driver for the AMD graphics accelerators
p fglrx-amdcccle - Catalyst Control Center for the AMD graphics accelerators
p fglrx-amdcccle-updates - Catalyst Control Center for the AMD graphics accelerators
v fglrx-control -
v fglrx-control -
p fglrx-dev - Video driver for the AMD graphics accelerators (devel files)
v fglrx-driver -
v fglrx-driver -
v fglrx-driver-dev -
v fglrx-driver-dev -
p fglrx-updates - Video driver for the AMD graphics accelerators
p fglrx-updates-dev - Video driver for the AMD graphics accelerators (devel files)
eric@bilbo:~$ aptitude show fglrx-updates
Paquet : fglrx-updates
Nouveau: oui
État: installé
Automatiquement installé: non
Version : 2:8.911-0ubuntu0.1
Priorité : supplémentaire
Section : restricted/misc
Responsable : Ubuntu Core Developers <email address hidden>
Taille décompressée : 170 M
Dépend: libc6 (>= 2.3.3), libfontconfig1 (>= 2.8.0), libfreetype6 (>= 2.2.1), libgcc1 (>= 1:4.1.1), libice6 (>= 1:1.0.0), libqtcore4 (>= 4:4.5.3), libqtgui4 (>= 4:4.5.3), libsm6,
         libstdc++6 (>= 4.1.1), libx11-6, libxcursor1 (> 1.1.2), libxext6, libxfixes3, libxinerama1, libxrandr2, libxrender1, libxxf86vm1, xserver-xorg-core, lib32gcc1, libc6-i386,
         dkms, make, linux-libc-dev, linux-headers-generic | linux-headers
Recommande: fglrx-amdcccle-updates
Est en conflit: fglrx-driver, fglrx-dri...