------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/drivers/gpu/drm/radeon/radeon_fence.c:235 radeon_fence_wait+0x24e/0x2b0 [radeon]()
Hardware name: Studio 1537
GPU lockup (waiting for 0x00000772 last fence id 0x0000076F)
Modules linked in: binfmt_misc parport_pc ppdev snd_hda_codec_atihdmi snd_hda_codec_idt arc4 snd_hda_intel radeon snd_hda_codec snd_hwdep snd_seq_midi iwlagn snd_pcm snd_rawmidi snd_seq_midi_event ttm drm_kms_helper iwlcore snd_seq mac80211 snd_timer snd_seq_device joydev dell_wmi drm r852 sm_common nand nand_ids nand_ecc snd mtd dell_laptop intel_agp cfg80211 psmouse serio_raw dcdbas i2c_algo_bit soundcore snd_page_alloc agpgart video output lp parport usbhid hid sdhci_pci firewire_ohci firewire_core crc_itu_t sdhci led_class tg3
Pid: 979, comm: Xorg Not tainted 2.6.35-15-generic-pae #21-Ubuntu
Call Trace:
 [<c0152242>] warn_slowpath_common+0x72/0xa0
 [<f8ae091e>] ? radeon_fence_wait+0x24e/0x2b0 [radeon]
 [<f8ae091e>] ? radeon_fence_wait+0x24e/0x2b0 [radeon]
 [<c0152313>] warn_slowpath_fmt+0x33/0x40
 [<f8ae091e>] radeon_fence_wait+0x24e/0x2b0 [radeon]
 [<c016dab0>] ? autoremove_wake_function+0x0/0x50
 [<f8af7f66>] radeon_ib_get+0xf6/0x210 [radeon]
 [<f8af9151>] ? radeon_cs_parser_init+0x211/0x290 [radeon]
 [<c0512430>] ? skb_dequeue+0x50/0x70
 [<f8af92f3>] radeon_cs_ioctl+0x63/0x180 [radeon]
 [<c0140a85>] ? __wake_up+0x45/0x60
 [<c0206466>] ? vm_unmap_aliases+0x156/0x160
 [<f886fb27>] drm_ioctl+0x1a7/0x400 [drm]
 [<c0206466>] ? vm_unmap_aliases+0x156/0x160
 [<f8af9290>] ? radeon_cs_ioctl+0x0/0x180 [radeon]
 [<c036223c>] ? __rb_erase_color+0xec/0x170
 [<c0110999>] ? __switch_to_xtra+0xc9/0x140
 [<c01412b6>] ? __dequeue_entity+0x26/0x50
 [<c0107e2c>] ? __switch_to+0x11c/0x180
 [<c01460bd>] ? finish_task_switch+0x3d/0xc0
 [<c0206466>] ? vm_unmap_aliases+0x156/0x160
 [<c022fcf2>] vfs_ioctl+0x32/0xb0
 [<c05ee14a>] ? schedule+0x37a/0x7a0
 [<f886f980>] ? drm_ioctl+0x0/0x400 [drm]
 [<c0230589>] do_vfs_ioctl+0x79/0x2d0
 [<c0230847>] sys_ioctl+0x67/0x80
 [<c0206466>] ? vm_unmap_aliases+0x156/0x160
 [<c010939f>] sysenter_do_call+0x12/0x28
 [<c0206466>] ? vm_unmap_aliases+0x156/0x160
 [<c0206466>] ? vm_unmap_aliases+0x156/0x160
---[ end trace 59d254a7a685ca12 ]---