Xorg assert failure: *** glibc detected *** /usr/bin/X: double free or corruption (!prev): 0x089ac1a0 ***

[mrAshley]

black screen, except mouse was moving.
jumped to virtual terminal and restarted gdm. everything was fine then. the screen saver may have gone on while a movie was in 'fullscreen' mode.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-core 2:1.9.99.901+git20110131.be3be758-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-2.29-generic 2.6.38-rc3
Uname: Linux 2.6.38-2-generic i686
Architecture: i386
AssertionMessage: *** glibc detected *** /usr/bin/X: double free or corruption (!prev): 0x089ac1a0 ***
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x600 1024x600
 edid-base64: AP///////wAiZOkDwSoAAB4SAQOAFg14CoYmlFdRkCchT1QAAAABAQEBAQEBAQEBAQEBAQEBlBEAsEBYGSA1I0UA3IEAAAAZFhQA2EBYJiBdIxUE3IEAAAAAAAAA/gAAAAAAAAAAAAAAAAAAAAAA/gAAAAAAAAAAAAEAAAAAANE=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Wed Feb 9 13:08:02 2011
DistUpgraded: Yes, recently upgraded Log time: 2011-01-14 00:15:54.376811
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
GraphicsCard:
 Subsystem: ASUSTeK Computer Inc. Device [1043:830f]
   Subsystem: ASUSTeK Computer Inc. Device [1043:830f]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101221.1)
MachineType: ASUSTeK Computer INC. 1000
ProcCmdline: /usr/bin/X :0 -nr -verbose -auth /var/run/gdm/auth-for-gdm-CXrKVQ/database -nolisten tcp vt7
ProcEnviron:
 LANG=en_CA.UTF-8
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=a12bcbdc-2139-4c90-b50d-79fd8c7450ef ro quiet splash vt.handoff=7
ProcKernelCmdLine_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=a12bcbdc-2139-4c90-b50d-79fd8c7450ef 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): 0x089ac1a0 ***
UserGroups:

dmi.bios.date: 08/01/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0803
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1000
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTek Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0803:bd08/01/2008:svnASUSTeKComputerINC.:pn1000:pvrx.x:rvnASUSTeKComputerINC.:rn1000:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x:
dmi.product.name: 1000
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
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.