Xorg crashed with SIGABRT in raise()

[hsherba]

Do not know why comes up every few login.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: xserver-xorg-core 2:1.13.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.8.0-9.18-generic 3.8.1
Uname: Linux 3.8.0-9-generic i686
.tmp.unity.support.test.0:

ApportVersion: 2.9-0ubuntu2
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CrashCounter: 1
CurrentDmesg:
 [ 15.133280] radeon 0000:00:01.0: fb0: radeondrmfb frame buffer device
 [ 15.133283] radeon 0000:00:01.0: registered panic notifier
 [ 15.133391] [drm] Initialized radeon 2.29.0 20080528 for 0000:00:01.0 on minor 0
 [ 16.383898] r8169 0000:02:00.0 eth0: link up
 [ 16.383907] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Date: Sun Mar 3 16:07:23 2013
DistUpgraded: Fresh install
DistroCodename: raring
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI Device [1002:9991] (prog-if 00 [VGA controller])
   Subsystem: Biostar Microtech Int'l Corp Device [1565:1708]
MachineType: BIOSTAR Group TA75MH2
MarkForUpload: True
ProcCmdline: /usr/bin/X :0 -core -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-9-generic root=UUID=729fd566-1d16-4b43-b9dc-ab0074e990d2 ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 OsAbort ()
 ?? ()
 FatalError ()
Title: Xorg crashed with SIGABRT in raise()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 08/30/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.5
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: TA75MH2
dmi.board.vendor: BIOSTAR Group
dmi.chassis.asset.tag: None
dmi.chassis.type: 3
dmi.chassis.vendor: BIOSTAR Group
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd08/30/2012:svnBIOSTARGroup:pnTA75MH2:pvr:rvnBIOSTARGroup:rnTA75MH2:rvr:cvnBIOSTARGroup:ct3:cvr:
dmi.product.name: TA75MH2
dmi.sys.vendor: BIOSTAR Group
version.compiz: compiz 1:0.9.9~daily13.03.01-0ubuntu1
version.libdrm2: libdrm2 2.4.42-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.2-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.3-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu3
xserver.bootTime: Sun Mar 3 16:10:52 2013
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Microsoft Microsoft 3-Button Mouse with IntelliEye(TM) MOUSE, id 8
 input AT Translated Set 2 keyboard KEYBOARD, id 9
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.2-0ubuntu2
xserver.video_driver: radeon

[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 #1037518, 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.