unity session stuck with only bg picture

[adrenochrome]

since last unity update from last week, i'm unable to open a unity session
when i try to open the session , the desktop background is loaded but nothing more (no icons, no menu, only an empty background)

the only key combinations that seems to be working is ctrl-alt-sup which allow me to exit the broken session successfully

i'm still able to log into gnome session

i'm attaching the .xsession-error corresponding to the broken session, since i suspect apport-bug to have grabed the log overwritten by the gnome session

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.30.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-26.42-generic 3.0.42
Uname: Linux 3.0.0-26-generic x86_64
NonfreeKernelModules: fglrx
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CompizPlugins: [core,bailer,crashhandler,detection,composite,opengl,compiztoolbox,decor,mousepoll,wall,imgsvg,place,vpswitch,regex,gnomecompat,grid,imgpng,resize,firepaint,imgjpeg,animation,animationaddon,move,wobbly,session,workarounds,expo,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: None
Date: Mon Oct 1 20:27:20 2012
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
GraphicsCard:
 ATI Technologies Inc Broadway XT [Mobility Radeon HD 5800 Series] [1002:68a0] (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. Device [1462:1054]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
JockeyStatus:
 xorg:fglrx_updates - ATI/AMD proprietary FGLRX graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
 xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 003: ID 06a3:0ccc Saitek PLC
MachineType: MICRO-STAR INTERNATIONAL CO., LTD MS-1727
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-26-generic root=UUID=36e36356-2176-4480-be71-e37f59d146fc ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/27/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: E1727IMS.10F
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MS-1727
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.board.version: REV:1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE1727IMS.10F:bd05/27/2011:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-1727:pvrREV1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-1727:rvrREV1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct10:cvrN/A:
dmi.product.name: MS-1727
dmi.product.version: REV:1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO., LTD
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6.1
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs 20090808ubuntu27~xorgedgers
version.libdrm2: libdrm2 2.4.33+git20120403.43704256-0ubuntu0ricotz~oneiric
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2+git20120429+8.0.e995b41a-0ubuntu0sarvatt~oneiric
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental 8.0.2+git20120429+8.0.e995b41a-0ubuntu0sarvatt~oneiric
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2+git20120429+8.0.e995b41a-0ubuntu0sarvatt~oneiric
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99+git20111216.7909975b-0ubuntu0sarvatt~oneiric
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99+git20120412.d282719a-0ubuntu0sarvatt~oneiric
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.18.0+git20120416.a1661620-0ubuntu0sarvatt~oneiric
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20120328.ab7291d3-0ubuntu0sarvatt~oneiric

[Andrea Azzarone (azzar1)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running apport-collect <bug #> and any other logs that are relevant for this particular issue.

[Andrea Azzarone (azzar1)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running apport-collect <bug #> and any other logs that are relevant for this particular issue.

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]