------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/drivers/gpu/drm/radeon/radeon_fence.c:235 radeon_fence_wait+0x23e/0x290 [radeon]()
Hardware name: U230
GPU lockup (waiting for 0x0013C35B last fence id 0x0013C352)
Modules linked in: aes_i586 aes_generic binfmt_misc parport_pc ppdev snd_hda_codec_atihdmi snd_hda_codec_realtek arc4 snd_hda_intel snd_hda_codec snd_hwdep radeon snd_seq_midi joydev snd_pcm snd_rawmidi ath9k snd_seq_midi_event ttm drm_kms_helper snd_seq ath9k_common hid_drff ath9k_hw ath snd_timer mac80211 snd_seq_device ff_memless drm cfg80211 snd agpgart i2c_algo_bit soundcore psmouse i2c_piix4 snd_page_alloc shpchp serio_raw k8temp led_class video output lp parport usbhid hid usb_storage ahci r8169 pata_atiixp libahci mii
Pid: 1302, comm: Xorg Tainted: G        W   2.6.35-15-generic #21-Ubuntu
Call Trace:
 [<c014a6e2>] warn_slowpath_common+0x72/0xa0
 [<f87981ae>] ? radeon_fence_wait+0x23e/0x290 [radeon]
 [<f87981ae>] ? radeon_fence_wait+0x23e/0x290 [radeon]
 [<c014a7b3>] warn_slowpath_fmt+0x33/0x40
 [<f87981ae>] radeon_fence_wait+0x23e/0x290 [radeon]
 [<c01657c0>] ? autoremove_wake_function+0x0/0x50
 [<f87ae6e2>] radeon_ib_get+0xf2/0x200 [radeon]
 [<f87af8c1>] ? radeon_cs_parser_init+0x211/0x290 [radeon]
 [<c0353bba>] ? idr_get_empty_slot+0x9a/0x130
 [<f87afa63>] radeon_cs_ioctl+0x63/0x180 [radeon]
 [<c0206466>] ? pages_shared_show+0x16/0x30
 [<f84ff987>] drm_ioctl+0x1a7/0x400 [drm]
 [<c0206466>] ? pages_shared_show+0x16/0x30
 [<f87afa00>] ? radeon_cs_ioctl+0x0/0x180 [radeon]
 [<c0168def>] ? __remove_hrtimer+0x2f/0xa0
 [<c0169258>] ? lock_hrtimer_base+0x28/0x50
 [<c016a0e9>] ? hrtimer_try_to_cancel+0x39/0xb0
 [<c0206466>] ? pages_shared_show+0x16/0x30
 [<c0225e52>] vfs_ioctl+0x32/0xb0
 [<f84ff7e0>] ? drm_ioctl+0x0/0x400 [drm]
 [<c02266e9>] do_vfs_ioctl+0x79/0x2d0
 [<c014f281>] ? sys_setitimer+0x51/0xa0
 [<c02269a7>] sys_ioctl+0x67/0x80
 [<c0206466>] ? pages_shared_show+0x16/0x30
 [<c05c9904>] syscall_call+0x7/0xb
 [<c0206466>] ? pages_shared_show+0x16/0x30
 [<c0206466>] ? pages_shared_show+0x16/0x30
---[ end trace 08d7634f63119d3b ]---