[228409.810197] ------------[ cut here ]------------
[228409.810206] kernel BUG at /build/buildd/linux-2.6.32/drivers/gpu/drm/ttm/ttm_bo.c:94!
[228409.810210] invalid opcode: 0000 [#1] SMP 
[228409.810215] last sysfs file: /sys/devices/virtual/net/vboxnet0/statistics/collisions
[228409.810218] Modules linked in: binfmt_misc rfcomm ppdev sco bridge stp bnep l2cap vboxnetadp vboxnetflt vboxdrv fbcon tileblit font bitblit softcursor vga16fb vgastate joydev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep arc4 pcmcia snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq iwl3945 radeon snd_timer snd_seq_device gspca_vc032x gspca_main iwlcore tifm_7xx1 acer_wmi yenta_socket rsrc_nonstatic videodev ttm drm_kms_helper mac80211 snd btusb tifm_core led_class bluetooth irda v4l1_compat crc_ccitt psmouse serio_raw pcmcia_core drm cfg80211 soundcore snd_page_alloc intel_agp i2c_algo_bit agpgart lp parport ohci1394 ieee1394 tg3
[228409.810299] 
[228409.810303] Pid: 3383, comm: Xorg Not tainted (2.6.32-14-generic #20-Ubuntu) Aspire 5670     
[228409.810307] EIP: 0060:[<f8695fcc>] EFLAGS: 00213286 CPU: 0
[228409.810317] EIP is at ttm_bo_release_list+0x9c/0xb0 [ttm]
[228409.810320] EAX: ffffffff EBX: f5989c00 ECX: f53a0568 EDX: f8695f01
[228409.810324] ESI: f5989c28 EDI: f40ba324 EBP: f0871de4 ESP: f0871dd8
[228409.810327]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[228409.810331] Process Xorg (pid: 3383, ti=f0870000 task=c9196680 task.ti=f0870000)
[228409.810334] Stack:
[228409.810336]  f5989c28 f8695f30 f40ba334 f0871df4 c034878d f5989c00 f40ba324 f0871e08
[228409.810345] <0> f869846a f5989c24 f8698400 c4a59b40 f0871e18 c034878d f40ba324 f5989c00
[228409.810354] <0> f0871e28 f8696f82 f0871e40 c4a59b40 f0871e38 f88911bf 00000000 f3975400
[228409.810364] Call Trace:
[228409.810374]  [<f8695f30>] ? ttm_bo_release_list+0x0/0xb0 [ttm]
[228409.810382]  [<c034878d>] ? kref_put+0x2d/0x60
[228409.810391]  [<f869846a>] ? ttm_bo_release+0x6a/0x80 [ttm]
[228409.810398]  [<f8698400>] ? ttm_bo_release+0x0/0x80 [ttm]
[228409.810403]  [<c034878d>] ? kref_put+0x2d/0x60
[228409.810410]  [<f8696f82>] ? ttm_bo_unref+0x32/0x50 [ttm]
[228409.810434]  [<f88911bf>] ? radeon_object_unref+0x1f/0x40 [radeon]
[228409.810459]  [<f889d627>] ? radeon_gem_object_free+0x27/0x30 [radeon]
[228409.810480]  [<f83d499b>] ? drm_gem_object_free+0x2b/0x60 [drm]
[228409.810497]  [<f83d4970>] ? drm_gem_object_free+0x0/0x60 [drm]
[228409.810502]  [<c034878d>] ? kref_put+0x2d/0x60
[228409.810519]  [<f83d4ad9>] ? drm_gem_close_ioctl+0x99/0xc0 [drm]
[228409.810535]  [<f83d3755>] ? drm_ioctl+0x185/0x370 [drm]
[228409.810552]  [<f83d4a40>] ? drm_gem_close_ioctl+0x0/0xc0 [drm]
[228409.810572]  [<f888f95c>] ? radeon_ttm_fault+0x1c/0x30 [radeon]
[228409.810579]  [<c01e1ea0>] ? __do_fault+0x40/0x490
[228409.810584]  [<c01e7c96>] ? mmap_region+0x1e6/0x460
[228409.810593]  [<c02139fb>] ? vfs_ioctl+0x7b/0x90
[228409.810598]  [<c0213c89>] ? do_vfs_ioctl+0x79/0x310
[228409.810604]  [<c05a7662>] ? do_page_fault+0x152/0x380
[228409.810609]  [<c0213f87>] ? sys_ioctl+0x67/0x80
[228409.810614]  [<c01033ec>] ? syscall_call+0x7/0xb
[228409.810617] Code: 47 08 31 c9 8b 53 20 8b 40 24 e8 80 e3 ff ff 89 d8 e8 d9 41 b6 c7 5b 5e 5f 5d c3 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe <0f> 0b eb fe 0f 0b eb fe 0f 0b eb fe 90 8d b4 26 00 00 00 00 55 
[228409.810671] EIP: [<f8695fcc>] ttm_bo_release_list+0x9c/0xb0 [ttm] SS:ESP 0068:f0871dd8
[228409.810683] ---[ end trace 866cd180d799bde1 ]---