Xorg assert failure: *** glibc detected *** /usr/bin/X: double free or corruption (!prev): 0x0a1ba3b0 ***

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ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-core 2:1.9.99.901+git20110131.be3be758-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-1.28-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic i686
Architecture: i386
AssertionMessage: *** glibc detected *** /usr/bin/X: double free or corruption (!prev): 0x0a1ba3b0 ***
CurrentDmesg: [ 31.695759] EXT4-fs (sda6): re-mounted. Opts: errors=remount-ro,commit=0
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x1024 1280x1024 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400
 edid-base64: AP///////wBMLR4BNzFKTSgQAQNsIht4KqqlplRUmSYUUFS/74CBgHFPAQEBAQEBAQEBAQEBMCoAmFEAKkAwcBMAUg4RAAAeAAAA/QA4Sx5RDgAKICAgICAgAAAA/ABTeW5jTWFzdGVyCiAgAAAA/wBITUNMQTAxMDI1CiAgAC4=
Date: Mon Feb 7 11:34:04 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
GraphicsCard: Subsystem: ASUSTeK Computer Inc. Device [1043:817a]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202)
MachineType: System manufacturer System Product Name
ProcCmdline: /usr/bin/X :0 -nr -verbose -auth /var/run/gdm/auth-for-gdm-jnlD8h/database -nolisten tcp vt7
ProcEnviron:
 LANG=ru_UA.UTF-8
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-1-generic root=UUID=88f183f6-b1b7-4ace-91cc-3164eac2184d ro quiet splash vt.handoff=7
ProcKernelCmdLine_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-1-generic root=UUID=88f183f6-b1b7-4ace-91cc-3164eac2184d ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/libc.so.6
 abort () from /lib/libc.so.6
 ?? () from /lib/libc.so.6
 ?? () from /lib/libc.so.6
Title: Xorg assert failure: *** glibc detected *** /usr/bin/X: double free or corruption (!prev): 0x0a1ba3b0 ***
UserGroups:

dmi.bios.date: 08/02/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0302
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5G-MX
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev x.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: ASUSTek Computer INC.
dmi.chassis.version: Rev 1.xx
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0302:bd08/02/2007:svnSystemmanufacturer:pnSystemProductName:pvrRev1.xx:rvnASUSTeKComputerINC.:rnP5G-MX:rvrRevx.xx:cvnASUSTekComputerINC.:ct3:cvrRev1.xx:
dmi.product.name: System Product Name
dmi.product.version: Rev 1.xx
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.2.1+glibmainloop4-0ubuntu9
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10-1ubuntu1
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.13.2+git20110124.fadee040-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu6
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu4

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #711422, 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.