X server crash - ATI M6 LY

apport detected the X server crash when I was trying to get a full backtrace using gdb.

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-core 2:1.7.6-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic i686
Architecture: i386
Date: Mon Apr 12 18:13:17 2010
DkmsStatus: Error: [Errno 2] No such file or directory
ExecutablePath: /usr/bin/Xorg
Lsusb:
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 046d:c019 Logitech, Inc. Optical Tilt Wheel Mouse
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: IBM 2672AEC
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   no card
ProcCmdLine: root=UUID=46aacfd3-26dd-438e-a50d-5d8951d49614 ro quiet splash
ProcCmdline: /usr/bin/X :1 -br -verbose -auth /var/run/gdm/auth-for-gdm-mXoifd/database -nolisten tcp
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
SegvAnalysis:
 Segfault happened at: 0x2b5fb6: rep movsl %ds:(%esi),%es:(%edi)
 PC (0x002b5fb6) ok
 source "%ds:(%esi)" (0x0000007b) not located in a known VMA region (needed readable region)!
 destination "%es:(%edi)" (0xb779407b) ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: xorg-server
Stacktrace:
 #0 0x002b5fb6 in ?? () from /lib/tls/i686/cmov/libc.so.6
 No symbol table info available.
 #1 0x00000000 in ?? ()
 No symbol table info available.
StacktraceTop:
 ?? () from /lib/tls/i686/cmov/libc.so.6
 ?? ()
Title: Xorg crashed with SIGSEGV
UserGroups:

dmi.bios.date: 09/22/2005
dmi.bios.vendor: IBM
dmi.bios.version: 1QET97WW (3.02 )
dmi.board.name: 2672AEC
dmi.board.vendor: IBM
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: IBM
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnIBM:bvr1QET97WW(3.02):bd09/22/2005:svnIBM:pn2672AEC:pvrThinkPadX32:rvnIBM:rn2672AEC:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
dmi.product.name: 2672AEC
dmi.product.version: ThinkPad X32
dmi.sys.vendor: IBM
system:
 distro: Ubuntu
 codename: lucid
 architecture: i686
 kernel: 2.6.32-19-generic