Xorg crashed with SIGSEGV in <signal handler called>()

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Hello,

I run kubuntu lucid alpha2 and i have a crash report automatic

on x86 64

ProblemType: Crash
Architecture: amd64
Date: Fri Jan 15 18:29:24 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/Xorg
InstallationMedia: Kubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100112.3)
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: innotek GmbH VirtualBox
Package: xserver-xorg-core 2:1.7.3.902-1ubuntu6
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=16M]
ProcAttrCurrent: unconfined (enforce)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-10-generic root=UUID=b5857fb8-3203-47aa-8e94-aa899665316d ro quiet splash
ProcCmdline: /usr/bin/X -br -nolisten tcp :0 vt8 -auth /var/run/xauth/A:0-NVeKuO
ProcEnviron:
 PATH=(custom, no user)
 LANG=C
ProcVersionSignature: Ubuntu 2.6.32-10.14-generic
RelatedPackageVersions:
 xserver-xorg 1:7.5+1ubuntu1
 libgl1-mesa-glx 7.7-0ubuntu5
 libdrm2 2.4.17-0ubuntu1
 xserver-xorg-video-intel 2:2.9.1-1ubuntu1
 xserver-xorg-video-ati 1:6.12.99+git20091125.0061c4db-0ubuntu2
SegvAnalysis:
 Segfault happened at: 0x7f4c19aeb191 <vfprintf+113>: mov 0x0(%r13),%rax
 PC (0x7f4c19aeb191) ok
 source "0x0(%r13)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: xorg-server
StacktraceTop:
 ?? () from /usr/lib/dri/swrast_dri.so
 <signal handler called>
 __close_nocancel () from /lib/libpthread.so.0
 ?? () from /usr/lib/xorg/modules/input/evdev_drv.so
 DisableDevice ()
Tags: lucid
Title: Xorg crashed with SIGSEGV in <signal handler called>()
Uname: Linux 2.6.32-10-generic x86_64
UserGroups:

XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
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
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 architecture: x86_64kernel: 2.6.32-10-generic

[Apport retracing service (apport)]

StacktraceTop:
 ?? () from /usr/lib/dri/swrast_dri.so
 <signal handler called>
 __close_nocancel () from /lib/libpthread.so.0
 EvdevProc (device=0x1565ad0,
 DisableDevice ()