Xorg crashed with SIGABRT in raise()

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ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: xserver-xorg-core 2:1.13.1.901-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-1.5-generic 3.8.0-rc4
Uname: Linux 3.8.0-1-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.8-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Sun Jan 20 13:00:25 2013
DistUpgraded: 2013-01-18 23:10:56,668 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.2.6, 3.5.0-22-generic, x86_64: installed
 vboxhost, 4.2.6, 3.8.0-0-generic, x86_64: installed
 vboxhost, 4.2.6, 3.8.0-1-generic, x86_64: installed
ExecutablePath: /usr/bin/Xorg
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0042] (rev 12) (prog-if 00 [VGA controller])
   Subsystem: Elitegroup Computer Systems Device [1019:2266]
InstallationDate: Installed on 2012-08-15 (157 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: ECS H55H-I
MarkForUpload: True
ProcCmdline: /usr/bin/X :0 -core -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-1-generic root=UUID=86280541-1387-4642-9676-1aecd433bfd7 ro quiet splash elevator=noop vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 OsAbort ()
 ?? ()
 FatalError ()
Title: Xorg crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to raring on 2013-01-18 (1 days ago)
UserGroups:

dmi.bios.date: 09/14/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080016
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: H55H-I
dmi.board.vendor: ECS
dmi.board.version: 1.0
dmi.chassis.asset.tag: 0123ABC
dmi.chassis.type: 3
dmi.chassis.vendor: ECS
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080016:bd09/14/2010:svnECS:pnH55H-I:pvr1.0:rvnECS:rnH55H-I:rvr1.0:cvnECS:ct3:cvr1.0:
dmi.product.name: H55H-I
dmi.product.version: 1.0
dmi.sys.vendor: ECS
version.compiz: compiz 1:0.9.9~daily13.01.17-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.41-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.1~git1212271322.7c3552~gd~q
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.1~git1212271322.7c3552~gd~q
version.xserver-xorg-core: xserver-xorg-core 2:1.13.1.901-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.18-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Sun Jan 20 13:06:42 2013
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Microsoft Microsoft® 2.4GHz Transceiver v6.0 KEYBOARD, id 8
 input Microsoft Microsoft® 2.4GHz Transceiver v6.0 KEYBOARD, id 9
 input Microsoft Microsoft® 2.4GHz Transceiver v6.0 KEYBOARD, id 10
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.1.901-0ubuntu1
xserver.video_driver: intel