Xorg crashes right after Login

[Pascal Hartig]

Binary package hint: xorg

After a fresh boot logging in with GDM crashes the X server right after the gnome desktop has loaded. This seems to happen randomly and I can't directly enforce it. Repeating the login procedure a few times helps. I haven't encountered any X crashes except for those directly after the login.

I'm using a Samsung Series 9 Notebook (Sandy Bridge). These are the relevant lines from the Xorg logfile:

Backtrace:
[ 38.169] 0: /usr/bin/X (xorg_backtrace+0x26) [0x4a2656]
[ 38.169] 1: /usr/bin/X (0x400000+0x621ca) [0x4621ca]
[ 38.169] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f830a986000+0xfc60) [0x7f830a995c60]
[ 38.169] 3: /usr/lib/xorg/modules/extensions/librecord.so (0x7f830833b000+0x2920) [0x7f830833d920]
[ 38.169] 4: /usr/bin/X (_CallCallbacks+0x34) [0x432af4]
[ 38.169] 5: /usr/bin/X (WriteToClient+0x21a) [0x461cca]
[ 38.169] 6: /usr/lib/xorg/modules/extensions/libdri2.so (ProcDRI2WaitMSCReply+0x52) [0x7f8307d22d82]
[ 38.169] 7: /usr/lib/xorg/modules/extensions/libdri2.so (DRI2WaitMSCComplete+0x59) [0x7f8307d21479]
[ 38.169] 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8307ace000+0x25030) [0x7f8307af3030]
[ 38.169] 9: /lib/x86_64-linux-gnu/libdrm.so.2 (drmHandleEvent+0x108) [0x7f8307f2c478]
[ 38.169] 10: /usr/bin/X (WakeupHandler+0x4b) [0x4322fb]
[ 38.169] 11: /usr/bin/X (WaitForSomething+0x1b6) [0x45c7b6]
[ 38.169] 12: /usr/bin/X (0x400000+0x2e032) [0x42e032]
[ 38.169] 13: /usr/bin/X (0x400000+0x21a7e) [0x421a7e]
[ 38.169] 14: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xff) [0x7f83098cfeff]
[ 38.169] 15: /usr/bin/X (0x400000+0x21629) [0x421629]
[ 38.169] Segmentation fault at address 0x7f830b58c010
[ 38.169]
Caught signal 11 (Segmentation fault). Server aborting
[ 38.169]
Please consult the The X.Org Foundation support
         at http://wiki.x.org

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
DRM.card0.DP.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768
 edid-base64: AP///////wBMo0YzAAAAAAAVAQOAHRB4Cof1lFdPjCcnUFQAAAABAQEBAQEBAQEBAQEBAQEBnhtWeFAAGDAwICUAJaUQAAAZAAAADwAAAAAAAAAAAB60AnQAAAAA/gBTQU1TVU5HCiAgICAgAAAA/gBMU04xMzNBVDAxODAxAF0=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Mon Jun 6 14:14:07 2011
DistUpgraded: Log time: 2011-05-30 08:49:20.056007
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 virtualbox-ose, 4.0.4, 2.6.38-8-generic, x86_64: installed
 bcmwl, 5.100.82.38+bdcom, 2.6.38-8-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Samsung Electronics Co Ltd Device [144d:c098]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 90X3A
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=87b34b62-8eef-4449-a119-08b040f31aed ro quiet splash i915.semaphores=1 vt.handoff=7
Renderer: Unknown
SourcePackage: xorg
UpgradeStatus: Upgraded to natty on 2011-05-30 (7 days ago)
dmi.bios.date: 03/08/2011
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 04HL
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 90X3A
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: FAB1
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr04HL:bd03/08/2011:svnSAMSUNGELECTRONICSCO.,LTD.:pn90X3A:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn90X3A:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
dmi.product.name: 90X3A
dmi.product.version: 0.1
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7