Xorg crashed with SIGABRT

[Sascha]

1) Ubuntu 12.04 LTS Beta 2 (nightly build)
2) Xorg 7.6+12ubuntu1
3) I get this bug on login to a new Unity session

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-core 2:1.11.4-0ubuntu10
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
.tmp.unity.support.test.0:

ApportVersion: 2.0.1-0ubuntu2
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
CrashCounter: 1
Date: Sat Apr 14 00:07:11 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI RS880M [Mobility Radeon HD 4200 Series] [1002:9712] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1604]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120327.1)
MachineType: Hewlett-Packard Presario CQ56 Notebook PC
ProcCmdline: /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-23-generic-pae root=/dev/mapper/sda5_crypt ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
Stacktrace:
 #0 0xb7537424 in __kernel_vsyscall ()
 No symbol table info available.
 Cannot access memory at address 0xbff04d40
StacktraceTop:

ThreadStacktrace:
 .
 Thread 1 (Thread 0xb70d4a40 (LWP 19519)):
 #0 0xb7537424 in __kernel_vsyscall ()
 No symbol table info available.
 Cannot access memory at address 0xbff04d40
Title: Xorg crashed with SIGABRT
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 09/14/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.05
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1604
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 88.05
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.05:bd09/14/2010:svnHewlett-Packard:pnPresarioCQ56NotebookPC:pvr059A100000042810010000000:rvnHewlett-Packard:rn1604:rvr88.05:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: Presario CQ56 Notebook PC
dmi.product.version: 059A100000042810010000000
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.7.6-0ubuntu2~ppa2
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[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 #943880, 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.