I have meet the same crashes but with intel chipset. Here is a snip of xorg logs:
[ 5627.344] (II) XKB: reuse xkmfile /var/lib/xkb/server-4083DBECFEED155AEB26754E3529D374C9A5ED79.xkm [ 6389.389] (II) XKB: reuse xkmfile /var/lib/xkb/server-4083DBECFEED155AEB26754E3529D374C9A5ED79.xkm [ 6869.605] Backtrace: [ 6869.606] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80eab1b] [ 6869.606] 1: /usr/bin/X (0x8048000+0x5fac8) [0x80a7ac8] [ 6869.606] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb4f40c] [ 6869.606] 3: /usr/bin/X (_CallCallbacks+0x3e) [0x8074e1e] [ 6869.606] 4: /usr/bin/X (WriteToClient+0x267) [0x80a7607] [ 6869.606] 5: /usr/lib/xorg/modules/extensions/libdri2.so (ProcDRI2WaitMSCReply+0x62) [0x1b5bf2] [ 6869.606] 6: /usr/lib/xorg/modules/extensions/libdri2.so (DRI2WaitMSCComplete+0x75) [0x1b3fc5] [ 6869.606] 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x78e000+0x226bc) [0x7b06bc] [ 6869.606] 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x78e000+0x87d2) [0x7967d2] [ 6869.606] 9: /lib/i386-linux-gnu/libdrm.so.2 (drmHandleEvent+0xf5) [0x1af665] [ 6869.606] 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x78e000+0x7937) [0x795937] [ 6869.606] 11: /usr/bin/X (WakeupHandler+0x52) [0x8074602] [ 6869.606] 12: /usr/bin/X (WaitForSomething+0x1ba) [0x80a1f3a] [ 6869.606] 13: /usr/bin/X (0x8048000+0x27f1e) [0x806ff1e] [ 6869.606] 14: /usr/bin/X (0x8048000+0x1a81c) [0x806281c] [ 6869.606] 15: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0x346e37] [ 6869.606] 16: /usr/bin/X (0x8048000+0x1a411) [0x8062411] [ 6869.606] Segmentation fault at address 0xb5a53008 [ 6869.606] Caught signal 11 (Segmentation fault). Server aborting [ 6869.606] Strange think i notice, the xorg seems to be build as a server?? ptsiamis@wintermute:/var/log$ cat Xorg.0.log.old [ 5408.461] X.Org X Server 1.10.1 Release Date: 2011-04-15 [ 5408.461] X Protocol Version 11, Revision 0 [ 5408.461] Build Operating System: Linux 2.6.24-29-server i686 Ubuntu [ 5408.461] Current Operating System: Linux wintermute 2.6.38-9-generic #43-Ubuntu SMP Thu Apr 28 15:25:15 UTC 2011 i686 [ 5408.461] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.38-9-generic root=UUID=a2609e31-b915-4c34-a77a-9ad70cb5b8c7 ro quiet splash vt.handoff=7 [ 5408.461] Build Date: 19 April 2011 03:33:17PM [ 5408.461] xorg-server 2:1.10.1-1ubuntu1 (For technical support please see http://www.ubuntu.com/support) Anyway chipset: [ 5408.468] (II) intel: Driver for Intel Integrated Graphics Chipsets: i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45, 4 Series, G45/G43, Q45/Q43, G41, B43, B43, Clarkdale, Arrandale, Sandybridge, Sandybridge, Sandybridge, Sandybridge, Sandybridge, Sandybridge, Sandybridge [ 5408.476] (II) intel(0): Integrated Graphics Chipset: Intel(R) 965GM [ 5408.476] (--) intel(0): Chipset: "965GM" ptsiamis@wintermute:/var/log$ modinfo i915 filename: /lib/modules/2.6.38-9-generic/kernel/drivers/gpu/drm/i915/i915.ko license: GPL and additional rights description: Intel Graphics author: Tungsten Graphics, Inc. license: GPL and additional rights srcversion: CE5A45F8B62D08682C7664F -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/765136 Title: [natty] X often crashes since upgrade to natty -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
