------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/drivers/gpu/drm/radeon/radeon_fence.c:235 radeon_fence_wait+0x365/0x3d0 [radeon]()
Hardware name:  
GPU lockup (waiting for 0x00146D1F last fence id 0x00146D1C)
Modules linked in: nls_iso8859_1 nls_cp437 vfat fat binfmt_misc arc4 snd_intel8x0 snd_ac97_codec ac97_bus snd_usb_audio snd_pcm radeon snd_hwdep snd_usbmidi_lib snd_seq_midi snd_rawmidi pcmcia snd_seq_midi_event ath5k ttm mac80211 drm_kms_helper snd_seq ath gspca_spca561 gspca_main snd_timer uvcvideo snd_seq_device cfg80211 drm videodev ppdev v4l1_compat yenta_socket pcmcia_rsrc v4l2_compat_ioctl32 i2c_algo_bit led_class pcmcia_core snd joydev edac_core edac_mce_amd k8temp psmouse serio_raw shpchp soundcore snd_page_alloc parport_pc i2c_nforce2 lp parport hid_logitech ff_memless usbhid hid usb_storage firewire_ohci r8169 mii firewire_core crc_itu_t pata_amd sata_nv forcedeth floppy
Pid: 1158, comm: Xorg Not tainted 2.6.35-15-generic #21-Ubuntu
Call Trace:
 [<ffffffff8105f6df>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff8105f7d6>] warn_slowpath_fmt+0x46/0x50
 [<ffffffffa032f5e5>] radeon_fence_wait+0x365/0x3d0 [radeon]
 [<ffffffff8107e490>] ? autoremove_wake_function+0x0/0x40
 [<ffffffffa032f8a0>] ? radeon_fence_create+0xd0/0x140 [radeon]
 [<ffffffffa034753d>] radeon_ib_get+0x12d/0x250 [radeon]
 [<ffffffffa0348aee>] radeon_cs_ioctl+0x8e/0x1e0 [radeon]
 [<ffffffffa01ec816>] ? drm_mode_cursor_ioctl+0xc6/0x170 [drm]
 [<ffffffffa01e034a>] drm_ioctl+0x34a/0x4c0 [drm]
 [<ffffffffa0348a60>] ? radeon_cs_ioctl+0x0/0x1e0 [radeon]
 [<ffffffff81588bb5>] ? _raw_spin_lock_irq+0x15/0x20
 [<ffffffff81588bb5>] ? _raw_spin_lock_irq+0x15/0x20
 [<ffffffff8143518b>] ? evdev_read+0x12b/0x290
 [<ffffffff811615ad>] vfs_ioctl+0x3d/0xd0
 [<ffffffff81161e81>] do_vfs_ioctl+0x81/0x340
 [<ffffffff81009da5>] ? sys_rt_sigreturn+0x235/0x250
 [<ffffffff811621c1>] sys_ioctl+0x81/0xa0
 [<ffffffff8100a0f2>] system_call_fastpath+0x16/0x1b
---[ end trace 1a06c6dfa66fd49b ]---