------------[ 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: F7Se                
GPU lockup (waiting for 0x000206D4 last fence id 0x000206D3)
Modules linked in: cryptd aes_x86_64 aes_generic binfmt_misc parport_pc ppdev snd_hda_codec_hdmi snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event joydev snd_seq r852 sm_common radeon ttm drm_kms_helper snd_timer snd_seq_device arc4 nand nand_ids ath5k ath mac80211 drm nand_ecc snd cfg80211 mtd uvcvideo videodev v4l2_compat_ioctl32 psmouse soundcore i2c_algo_bit lp video snd_page_alloc serio_raw asus_laptop parport sparse_keymap usbhid hid firewire_ohci sdhci_pci sdhci firewire_core crc_itu_t ahci libahci sky2
Pid: 946, comm: Xorg Tainted: G        W   2.6.38-5-generic #32-Ubuntu
Call Trace:
 [<ffffffff8106574f>] ? warn_slowpath_common+0x7f/0xc0
 [<ffffffff81065846>] ? warn_slowpath_fmt+0x46/0x50
 [<ffffffffa02b865f>] ? radeon_fence_wait+0x36f/0x3e0 [radeon]
 [<ffffffff810876d0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffffa02d1f6d>] ? radeon_ib_get+0x12d/0x1e0 [radeon]
 [<ffffffffa02d394e>] ? radeon_cs_ioctl+0x8e/0x1e0 [radeon]
 [<ffffffffa0186384>] ? drm_ioctl+0x3e4/0x4c0 [drm]
 [<ffffffffa02d38c0>] ? radeon_cs_ioctl+0x0/0x1e0 [radeon]
 [<ffffffff811643ab>] ? do_readv_writev+0x19b/0x1e0
 [<ffffffffa026a0df>] ? ttm_bo_unref+0x3f/0x60 [ttm]
 [<ffffffff811750ef>] ? do_vfs_ioctl+0x8f/0x360
 [<ffffffff81175451>] ? sys_ioctl+0x91/0xa0
 [<ffffffff8100c002>] ? system_call_fastpath+0x16/0x1b
---[ end trace 5d1d415e74dedeb9 ]---