------------[ 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: System Product Name
GPU lockup (waiting for 0x00073124 last fence id 0x00073122)
Modules linked in: btrfs zlib_deflate crc32c libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs xt_multiport iptable_filter ip_tables x_tables binfmt_misc vboxnetadp vboxnetflt vboxdrv nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss snd_hda_codec_atihdmi snd_hda_codec_via sunrpc snd_seq_midi snd_rawmidi snd_hda_intel snd_seq_midi_event radeon snd_hda_codec snd_hwdep ppdev snd_seq snd_pcm parport_pc asus_atk0110 ttm drm_kms_helper drm snd_seq_device i2c_algo_bit snd_timer snd edac_core edac_mce_amd k10temp shpchp i2c_piix4 soundcore snd_page_alloc lp parport usbhid hid firewire_ohci firewire_core r8169 crc_itu_t mii ahci pata_atiixp libahci
Pid: 1146, comm: Xorg Not tainted 2.6.35-17-generic #23-Ubuntu
Call Trace:
 [<ffffffff8105f72f>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff8105f826>] warn_slowpath_fmt+0x46/0x50
 [<ffffffffa01fc5e5>] radeon_fence_wait+0x365/0x3d0 [radeon]
 [<ffffffff8107e510>] ? autoremove_wake_function+0x0/0x40
 [<ffffffffa01fcde1>] radeon_sync_obj_wait+0x11/0x20 [radeon]
 [<ffffffffa018c1a3>] ttm_bo_wait+0x103/0x1c0 [ttm]
 [<ffffffffa0190641>] ttm_bo_vm_fault+0x231/0x2f0 [ttm]
 [<ffffffff81014432>] ? save_i387_xstate+0x1b2/0x210
 [<ffffffffa01fcd8b>] radeon_ttm_fault+0x5b/0x80 [radeon]
 [<ffffffff8111c974>] __do_fault+0x54/0x560
 [<ffffffff81586c35>] ? _raw_spin_lock_irq+0x15/0x20
 [<ffffffff810097d1>] ? handle_signal+0x131/0x280
 [<ffffffff8111f8a9>] handle_mm_fault+0x1b9/0x440
 [<ffffffff810141f8>] ? restore_i387_xstate+0x138/0x1c0
 [<ffffffff8116171d>] ? vfs_ioctl+0x3d/0xd0
 [<ffffffff8158a8fa>] do_page_fault+0x12a/0x350
 [<ffffffff81587475>] page_fault+0x25/0x30
---[ end trace 8c2d0ee61606dc30 ]---