------------[ 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: 20827SG
GPU lockup (waiting for 0x0020D69F last fence id 0x0020D69E)
Modules linked in: xts gf128mul nls_iso8859_1 nls_cp437 vfat fat usb_storage uas rfcomm binfmt_misc sco bnep l2cap joydev snd_hda_codec_conexant arc4 snd_hda_intel snd_hda_codec snd_hwdep pcmcia snd_pcm thinkpad_acpi snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq iwlagn zaurus iwlcore snd_timer snd_seq_device mac80211 uvcvideo btusb r852 cdc_ether sm_common nand yenta_socket pcmcia_rsrc snd ppdev videodev nand_ids nand_ecc usbnet cfg80211 bluetooth v4l2_compat_ioctl32 cdc_wdm cdc_acm pcmcia_core mtd psmouse snd_page_alloc soundcore serio_raw tpm_tis parport_pc tpm nvram tpm_bios lp parport sha256_generic cryptd aes_x86_64 aes_generic dm_crypt usbhid hid radeon firewire_ohci ttm drm_kms_helper drm video sdhci_pci sdhci i2c_algo_bit ahci firewire_core libahci crc_itu_t e1000e
Pid: 9652, comm: compiz Not tainted 2.6.38-7-generic #39-Ubuntu
Call Trace:
 [<ffffffff8106573f>] ? warn_slowpath_common+0x7f/0xc0
 [<ffffffff81065836>] ? warn_slowpath_fmt+0x46/0x50
 [<ffffffffa013e66f>] ? radeon_fence_wait+0x36f/0x3e0 [radeon]
 [<ffffffff81087710>] ? autoremove_wake_function+0x0/0x40
 [<ffffffffa013ef51>] ? radeon_sync_obj_wait+0x11/0x20 [radeon]
 [<ffffffffa00bdb0d>] ? ttm_bo_wait+0xfd/0x1b0 [ttm]
 [<ffffffffa00bde88>] ? ttm_bo_list_ref_sub+0x28/0x30 [ttm]
 [<ffffffffa01578e3>] ? radeon_gem_wait_idle_ioctl+0x93/0x110 [radeon]
 [<ffffffffa0085384>] ? drm_ioctl+0x3e4/0x4c0 [drm]
 [<ffffffffa0157850>] ? radeon_gem_wait_idle_ioctl+0x0/0x110 [radeon]
 [<ffffffff811751cf>] ? do_vfs_ioctl+0x8f/0x360
 [<ffffffff81175531>] ? sys_ioctl+0x91/0xa0
 [<ffffffff8100c002>] ? system_call_fastpath+0x16/0x1b
---[ end trace f269322b0b987fff ]---