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[bugbot <788659@xxxxxxxxxxxxxxxxxx>]

Hi Stuart.  Please collect a full backtrace on this crash - see
http://wiki.ubuntu.com/X/Backtracing for guidance.

Seems to be crashing in the libdri2 code while trying to write back to
the client program.  So it sounds like something that may be client-
specific.  Can you provide some example links you clicked on so we can
see if it is reproducible?

** Description changed:

  Binary package hint: xorg
  
  This has happened a number of times over the last week, but I can't
  replicate it on demand. It seems to be associated with clicking a link
  in chromium, although I can't confirm that it's *only* happened in that
  situation.
+ 
+ Backtrace:
+ [370186.294] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80eab1b]
+ [370186.294] 1: /usr/bin/X (0x8048000+0x5fac8) [0x80a7ac8]
+ [370186.294] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb78a240c]
+ [370186.294] 3: /usr/bin/X (_CallCallbacks+0x3e) [0x8074e1e]
+ [370186.294] 4: /usr/bin/X (WriteToClient+0x267) [0x80a7607]
+ [370186.294] 5: /usr/lib/xorg/modules/extensions/libdri2.so (ProcDRI2WaitMSCReply+0x62) [0xb7450bf2]
+ [370186.294] 6: /usr/lib/xorg/modules/extensions/libdri2.so (DRI2WaitMSCComplete+0x75) [0xb744efc5]
+ [370186.294] 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb73d8000+0x226bc) [0xb73fa6bc]
+ [370186.294] 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb73d8000+0x87d2) [0xb73e07d2]
+ [370186.294] 9: /lib/i386-linux-gnu/libdrm.so.2 (drmHandleEvent+0xf5) [0xb7429665]
+ [370186.294] 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb73d8000+0x7937) [0xb73df937]
+ [370186.294] 11: /usr/bin/X (WakeupHandler+0x52) [0x8074602]
+ [370186.294] 12: /usr/bin/X (WaitForSomething+0x1ba) [0x80a1f3a]
+ [370186.294] 13: /usr/bin/X (0x8048000+0x27f1e) [0x806ff1e]
+ [370186.294] 14: /usr/bin/X (0x8048000+0x1a81c) [0x806281c]
+ [370186.295] 15: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0xb75a8e37]
+ [370186.295] 16: /usr/bin/X (0x8048000+0x1a411) [0x8062411]
+ [370186.295] Segmentation fault at address 0xb497b008
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: xorg 1:7.6+4ubuntu3
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
  Uname: Linux 2.6.38-8-generic-pae i686
  Architecture: i386
  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.HDMI.A.1:
-  status: disconnected
-  enabled: disabled
-  dpms: Off
-  modes: 
-  edid-base64:
+  status: disconnected
+  enabled: disabled
+  dpms: Off
+  modes:
+  edid-base64:
  DRM.card0.LVDS.1:
-  status: connected
-  enabled: enabled
-  dpms: On
-  modes: 1280x800
-  edid-base64: AP///////wAwZAYjMjQ5NTISAQOAHRJ4Cof1lFdPjCcnUFQAAAABAQEBAQEBAQEBAQEBAQEBKhwAqFAgHjAQMCIAH7QQAAAYAAAAAAAAAAAAAAAAAAAAAAAAAAAA/gBSUDc3NKMxMzNFV0REAAAA/gAIDBAUKFB/2AEBCiAgAL4=
+  status: connected
+  enabled: enabled
+  dpms: On
+  modes: 1280x800
+  edid-base64: AP///////wAwZAYjMjQ5NTISAQOAHRJ4Cof1lFdPjCcnUFQAAAABAQEBAQEBAQEBAQEBAQEBKhwAqFAgHjAQMCIAH7QQAAAYAAAAAAAAAAAAAAAAAAAAAAAAAAAA/gBSUDc3NKMxMzNFV0REAAAA/gAIDBAUKFB/2AEBCiAgAL4=
  DRM.card0.VGA.1:
-  status: disconnected
-  enabled: disabled
-  dpms: Off
-  modes: 
-  edid-base64:
+  status: disconnected
+  enabled: disabled
+  dpms: Off
+  modes:
+  edid-base64:
  Date: Thu May 26 15:53:11 2011
  DistUpgraded: Log time: 2011-01-18 17:25:59.814253
  DistroCodename: natty
  DistroVariant: ubuntu
  GraphicsCard:
-  Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
-    Subsystem: Dell Device [1028:0209]
-    Subsystem: Dell Device [1028:0209]
+  Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
+    Subsystem: Dell Device [1028:0209]
+    Subsystem: Dell Device [1028:0209]
  MachineType: Dell Inc. XPS M1330
  ProcEnviron:
-  LANGUAGE=en_GB:en
-  PATH=(custom, user)
-  LANG=en_US.UTF-8
-  LC_MESSAGES=en_GB.utf8
-  SHELL=/bin/bash
+  LANGUAGE=en_GB:en
+  PATH=(custom, user)
+  LANG=en_US.UTF-8
+  LC_MESSAGES=en_GB.utf8
+  SHELL=/bin/bash
  ProcKernelCmdLine: root=UUID=b572742c-deea-43ec-92d3-b1d1e6b6802f ro quiet splash
  Renderer: Unknown
  SourcePackage: xorg
  UpgradeStatus: Upgraded to natty on 2011-01-18 (127 days ago)
  dmi.bios.date: 12/26/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.name: 0N6705
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/26/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn0N6705:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: XPS M1330
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
  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 N/A
  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

** Package changed: xorg (Ubuntu) => xserver-xorg-video-intel (Ubuntu)

** Changed in: xserver-xorg-video-intel (Ubuntu)
   Importance: Undecided => High

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/788659

Title:
  X crashes, taking me back to gdm