compiz crashed with SIGSEGV in GLScreen::GLScreen()

[xteejx]

Crash on login to Ubuntu Desktop 12.10
No unity or desktop showing after.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: compiz-core 1:0.9.8.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
Uname: Linux 3.5.0-13-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.5.1-0ubuntu4
Architecture: amd64
Date: Wed Sep 5 22:33:33 2012
DistUpgraded: 2012-09-05 22:30:27,358 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus:
 fglrx, 8.960, 3.2.0-30-generic, x86_64: installed
 fglrx, 8.960, 3.5.0-13-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI Barts PRO [Radeon HD 6800 Series] [1002:6739] (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. EAH6850 [Radeon HD 6850] [1043:03b4]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
JockeyStatus:
 kmod:fglrx - ATI Fire GL (Proprietary, Enabled, In use)
 kmod:fglrx_updates - Video driver for the AMD graphics accelerators (Proprietary, Disabled, Not in use)
MachineType: System manufacturer System Product Name
ProcCmdline: Compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-13-generic root=UUID=7878E83078E7EAB8 loop=/hostname/disks/root.disk ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f8e611d89c4: movzbl (%rdi),%eax
 PC (0x7f8e611d89c4) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 GLScreen::GLScreen(CompScreen*) () from /usr/lib/compiz/libopengl.so
 PluginClassHandler<GLScreen, CompScreen, 5>::get(CompScreen*) () from /usr/lib/compiz/libopengl.so
 CompPlugin::VTableForScreenAndWindow<GLScreen, GLWindow>::initScreen(CompScreen*) () from /usr/lib/compiz/libopengl.so
 CompManager::initPlugin(CompPlugin*) () from /usr/lib/libcompiz_core.so.ABI-20120603
Title: compiz crashed with SIGSEGV in GLScreen::GLScreen()
UpgradeStatus: Upgraded to quantal on 2012-09-05 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 12/15/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0307
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A88T-V EVO/USB3
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0307:bd12/15/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A88T-VEVO/USB3:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.8.0-0ubuntu1
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.38-0ubuntu2
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120821.c1114c61-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120821.c1114c61-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.12.99.905-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120713.6ef1ad6a-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.3-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.1-4~ubuntu1

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #944653, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.