------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_fence.c:248 radeon_fence_wait+0x36f/0x3e0 [radeon]()
Hardware name: 2765PCU
GPU lockup (waiting for 0x0000018C last fence id 0x00000189)
Modules linked in: binfmt_misc rfcomm sco bnep l2cap parport_pc ppdev arc4 radeon ttm drm_kms_helper snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep iwlagn joydev pcmcia drm snd_pcm thinkpad_acpi snd_seq_midi snd_rawmidi snd_seq_midi_event yenta_socket tpm_tis lp uvcvideo iwlcore video videodev btusb parport snd_seq pcmcia_rsrc tpm nvram snd_timer snd_seq_device i2c_algo_bit pcmcia_core tpm_bios v4l2_compat_ioctl32 snd mac80211 soundcore bluetooth psmouse serio_raw cfg80211 snd_page_alloc firewire_ohci firewire_core crc_itu_t ahci libahci e1000e
Pid: 1135, comm: Xorg Not tainted 2.6.38-8-generic #41-Ubuntu
Call Trace:
 [<ffffffff81065cef>] ? warn_slowpath_common+0x7f/0xc0
 [<ffffffff81065de6>] ? warn_slowpath_fmt+0x46/0x50
 [<ffffffffa039e6df>] ? radeon_fence_wait+0x36f/0x3e0 [radeon]
 [<ffffffff81087f30>] ? autoremove_wake_function+0x0/0x40
 [<ffffffffa039efc1>] ? radeon_sync_obj_wait+0x11/0x20 [radeon]
 [<ffffffffa035ab0d>] ? ttm_bo_wait+0xfd/0x1b0 [ttm]
 [<ffffffffa035ae88>] ? ttm_bo_list_ref_sub+0x28/0x30 [ttm]
 [<ffffffffa03b79e3>] ? radeon_gem_wait_idle_ioctl+0x93/0x110 [radeon]
 [<ffffffffa0261384>] ? drm_ioctl+0x3e4/0x4c0 [drm]
 [<ffffffffa03b7950>] ? radeon_gem_wait_idle_ioctl+0x0/0x110 [radeon]
 [<ffffffff810165fb>] ? check_for_xstate+0x3b/0xb0
 [<ffffffff810166c4>] ? restore_user_xstate+0x54/0xa0
 [<ffffffff8117648f>] ? do_vfs_ioctl+0x8f/0x360
 [<ffffffff8100bd06>] ? sys_rt_sigreturn+0x106/0x140
 [<ffffffff811767f1>] ? sys_ioctl+0x91/0xa0
 [<ffffffff8100c002>] ? system_call_fastpath+0x16/0x1b
---[ end trace 9d81efda255b36b2 ]---