------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_fence.c:248 radeon_fence_wait+0x2ea/0x360 [radeon]()
Hardware name: Studio XPS 1645
GPU lockup (waiting for 0x0001D7D4 last fence id 0x0001D7D3)
Modules linked in: nls_utf8 udf binfmt_misc parport_pc ppdev snd_hda_codec_hdmi joydev snd_hda_codec_idt arc4 snd_hda_intel snd_hda_codec iwlagn snd_hwdep snd_pcm iwlcore radeon snd_seq_midi snd_rawmidi mac80211 snd_seq_midi_event ttm snd_seq dell_wmi snd_timer drm_kms_helper sparse_keymap snd_seq_device dell_laptop dcdbas i7core_edac uvcvideo videodev snd psmouse serio_raw edac_core cfg80211 drm video i2c_algo_bit soundcore snd_page_alloc lp parport usb_storage uas usbhid hid firewire_ohci firewire_core ahci tg3 libahci sdhci_pci sdhci crc_itu_t
Pid: 1330, comm: compiz Not tainted 2.6.38-7-generic-pae #39-Ubuntu
Call Trace:
 [<c1058d32>] ? warn_slowpath_common+0x72/0xa0
 [<f89faeaa>] ? radeon_fence_wait+0x2ea/0x360 [radeon]
 [<f89faeaa>] ? radeon_fence_wait+0x2ea/0x360 [radeon]
 [<c1058e03>] ? warn_slowpath_fmt+0x33/0x40
 [<f89faeaa>] ? radeon_fence_wait+0x2ea/0x360 [radeon]
 [<c1076be0>] ? autoremove_wake_function+0x0/0x50
 [<f89fb731>] ? radeon_sync_obj_wait+0x11/0x20 [radeon]
 [<f879b719>] ? ttm_bo_wait+0xd9/0x170 [ttm]
 [<f8a137b2>] ? radeon_gem_wait_idle_ioctl+0x82/0xe0 [radeon]
 [<f8737db1>] ? drm_ioctl+0x1e1/0x470 [drm]
 [<f8a13730>] ? radeon_gem_wait_idle_ioctl+0x0/0xe0 [radeon]
 [<c110bc59>] ? handle_mm_fault+0x109/0x190
 [<c1534d70>] ? do_page_fault+0x0/0x490
 [<c1534f9f>] ? do_page_fault+0x22f/0x490
 [<f8737bd0>] ? drm_ioctl+0x0/0x470 [drm]
 [<c1141d7b>] ? do_vfs_ioctl+0x7b/0x2e0
 [<c1142067>] ? sys_ioctl+0x87/0x90
 [<c100ab5f>] ? sysenter_do_call+0x12/0x28
---[ end trace 2f4b7f8da8b27562 ]---