gnome-session-check-accelerated-helper crashed with SIGSEGV in XF86DRIQueryVersion()

[steinhauser christian]

ubuntu test computer number 04
after boot

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: gnome-session-bin 3.1.3-0ubuntu6
ProcVersionSignature: Ubuntu 3.0.0-7.9-generic 3.0.0
Uname: Linux 3.0.0-7-generic x86_64
Architecture: amd64
CrashCounter: 1
Date: Wed Aug 3 11:58:24 2011
ExecutablePath: /usr/lib/gnome-session/gnome-session-check-accelerated-helper
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705.1)
ProcCmdline: /usr/lib/gnome-session/gnome-session-check-accelerated-helper
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/false
 PATH=(custom, no user)
SegvAnalysis:
 Segfault happened at: 0x7f74c0c5116e <XF86DRIQueryVersion+174>: mov 0x4(%rax),%eax
 PC (0x7f74c0c5116e) ok
 source "0x4(%rax)" (0x00000004) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gnome-session
StacktraceTop:
 XF86DRIQueryVersion () from /usr/lib/fglrx/libGL.so.1
 XF86DRIQueryExtension () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
Title: gnome-session-check-accelerated-helper crashed with SIGSEGV in XF86DRIQueryVersion()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 XF86DRIQueryVersion () from /usr/lib/fglrx/libGL.so.1
 XF86DRIQueryExtension () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1