------------[ 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: 200749U
GPU lockup (waiting for 0x00000009 last fence id 0x00000007)
Modules linked in: binfmt_misc parport_pc ppdev vboxnetadp vboxnetflt vboxdrv ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp arc4 pcmcia radeon snd_hda_codec_analog snd_hda_intel iwl3945 snd_hda_codec snd_hwdep ttm snd_pcm thinkpad_acpi drm_kms_helper iwlcore snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq mac80211 snd_timer irda snd_seq_device tpm_tis drm yenta_socket joydev video crc_ccitt nvram output tpm tpm_bios snd pcmcia_rsrc pcmcia_core psmouse serio_raw cfg80211 led_class intel_agp soundcore snd_page_alloc i2c_algo_bit lp agpgart parport usbhid hid e1000e
Pid: 986, comm: Xorg Not tainted 2.6.35-15-generic #21-Ubuntu
Call Trace:
 [<c014a6e2>] warn_slowpath_common+0x72/0xa0
 [<f88931ae>] ? radeon_fence_wait+0x23e/0x290 [radeon]
 [<f88931ae>] ? radeon_fence_wait+0x23e/0x290 [radeon]
 [<c014a7b3>] warn_slowpath_fmt+0x33/0x40
 [<f88931ae>] radeon_fence_wait+0x23e/0x290 [radeon]
 [<c01657c0>] ? autoremove_wake_function+0x0/0x50
 [<f88938d1>] radeon_sync_obj_wait+0x11/0x20 [radeon]
 [<f86bde67>] ttm_bo_wait+0xe7/0x180 [ttm]
 [<f88a8e19>] radeon_gem_wait_idle_ioctl+0x89/0x110 [radeon]
 [<f81b6987>] drm_ioctl+0x1a7/0x400 [drm]
 [<f88a8d90>] ? radeon_gem_wait_idle_ioctl+0x0/0x110 [radeon]
 [<c010afb2>] ? restore_i387_xstate+0xe2/0x210
 [<c0225e52>] vfs_ioctl+0x32/0xb0
 [<f81b67e0>] ? drm_ioctl+0x0/0x400 [drm]
 [<c02266e9>] do_vfs_ioctl+0x79/0x2d0
 [<c01021d6>] ? restore_sigcontext+0xc6/0xe0
 [<c02269a7>] sys_ioctl+0x67/0x80
 [<c05c9904>] syscall_call+0x7/0xb
---[ end trace 1b4c55db67a5155e ]---