Xorg crashed with SIGSEGV in Dispatch()

[antdl]

another crash on startup

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Fri Oct 9 17:13:41 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/Xorg
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: innotek GmbH VirtualBox
Package: xserver-xorg-core 2:1.6.3-1ubuntu7
PciDisplay:
 00:02.0 VGA compatible controller [0300]: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter [80ee:beef]
  Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  Latency: 64
  Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M]
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-13-generic root=UUID=a07bab84-3c7c-4ef4-bfa3-07c827e68f05 ro quiet splash
ProcCmdline: /usr/bin/X :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-HMLj8b/database -nolisten tcp vt7
ProcEnviron:
 LANG=it_IT.UTF-8
 PATH=(custom, no user)
ProcVersionSignature: Ubuntu 2.6.31-13.42-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.6.0-1ubuntu1
 libdrm2 2.4.14-1ubuntu1
 xserver-xorg-video-intel 2:2.9.0-1ubuntu1
 xserver-xorg-video-ati 1:6.12.99+git20090825.fc74e119-0ubuntu3
SegvAnalysis:
 Segfault happened at: 0xcabfae: cmpw $0xb858,(%eax)
 PC (0x00cabfae) ok
 source "$0xb858" ok
 destination "(%eax)" (0x005c2b90) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: xorg-server
StacktraceTop:
 ?? ()
 Dispatch ()
 main ()
Title: Xorg crashed with SIGSEGV in Dispatch()
Uname: Linux 2.6.31-13-generic i686
UserGroups:

dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.31-13-generic
xkbcomp:
 Error: command ['xkbcomp', ':0', '-w0', '-'] failed with exit code 1: Error: Cannot open display ":0"
                   Exiting

[Apport retracing service (apport)]

StacktraceTop:?? ()
Dispatch () at ../../dix/dispatch.c:367
main (argc=9, argv=0xbfd145c4, envp=0xbfd145ec)