[   24.208233] ata1.00: configured for UDMA/100
[   24.208249] ata1: EH complete
[   24.888416] EXT4-fs (loop0): re-mounted. Opts: errors=remount-ro,commit=0
[   29.720238] ata1.00: configured for UDMA/100
[   29.720252] ata1: EH complete
[   30.166204] EXT4-fs (loop0): re-mounted. Opts: errors=remount-ro,commit=0
[   32.768024] eth0: no IPv6 routers present
[55965.716024] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[55965.717917] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 194188 at 194186)
[55965.717930] ------------[ cut here ]------------
[55965.717971] WARNING: at /build/buildd/linux-2.6.35/drivers/gpu/drm/i915/i915_gem_tiling.c:337 i915_gem_set_tiling+0x212/0x220 [i915]()
[55965.717977] Hardware name: Dimension 4500S              
[55965.717980] failed to reset object for tiling switch
[55965.717984] Modules linked in: binfmt_misc snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event i915 snd_seq snd_timer drm_kms_helper snd_seq_device drm ppdev i2c_algo_bit intel_agp parport_pc dcdbas snd psmouse video soundcore output snd_page_alloc serio_raw shpchp agpgart lp parport 8139too 8139cp floppy mii
[55965.718037] Pid: 706, comm: Xorg Not tainted 2.6.35-19-generic #28-Ubuntu
[55965.718042] Call Trace:
[55965.718062]  [<c014a812>] warn_slowpath_common+0x72/0xa0
[55965.718081]  [<f82dca22>] ? i915_gem_set_tiling+0x212/0x220 [i915]
[55965.718099]  [<f82dca22>] ? i915_gem_set_tiling+0x212/0x220 [i915]
[55965.718108]  [<c014a8e3>] warn_slowpath_fmt+0x33/0x40
[55965.718126]  [<f82dca22>] i915_gem_set_tiling+0x212/0x220 [i915]
[55965.718137]  [<c0106461>] ? unmask_8259A+0x1/0x40
[55965.718170]  [<f824198d>] drm_ioctl+0x1ad/0x430 [drm]
[55965.718178]  [<c0106461>] ? unmask_8259A+0x1/0x40
[55965.718207]  [<f82dc810>] ? i915_gem_set_tiling+0x0/0x220 [i915]
[55965.718218]  [<c010afb2>] ? restore_i387_xstate+0xe2/0x210
[55965.718229]  [<c0218092>] ? rw_verify_area+0x62/0xd0
[55965.718238]  [<c0150e8c>] ? __do_softirq+0xec/0x1b0
[55965.718244]  [<c0106461>] ? unmask_8259A+0x1/0x40
[55965.718254]  [<c02260e2>] vfs_ioctl+0x32/0xb0
[55965.718284]  [<f82417e0>] ? drm_ioctl+0x0/0x430 [drm]
[55965.718290]  [<c0226979>] do_vfs_ioctl+0x79/0x2d0
[55965.718297]  [<c01021d6>] ? restore_sigcontext+0xc6/0xe0
[55965.718303]  [<c0226c37>] sys_ioctl+0x67/0x80
[55965.718311]  [<c05c8364>] syscall_call+0x7/0xb
[55965.718318]  [<c0106461>] ? unmask_8259A+0x1/0x40
[55965.718324] ---[ end trace b9df92dccb101d8e ]---
[56709.148264] ptrace of non-child pid 2020 was attempted by: firefox-bin (pid 2019)
[56709.148276] ptrace of non-child pid 2021 was attempted by: firefox-bin (pid 2019)
[56709.148284] ptrace of non-child pid 2064 was attempted by: firefox-bin (pid 2019)
[56709.148292] ptrace of non-child pid 2083 was attempted by: firefox-bin (pid 2019)
[56731.827340] ptrace of non-child pid 2089 was attempted by: firefox-bin (pid 2019)
[56731.827352] ptrace of non-child pid 2090 was attempted by: firefox-bin (pid 2019)
[56731.827360] ptrace of non-child pid 2094 was attempted by: firefox-bin (pid 2019)
[56731.827368] ptrace of non-child pid 2095 was attempted by: firefox-bin (pid 2019)
[56731.827376] ptrace of non-child pid 2096 was attempted by: firefox-bin (pid 2019)
[56731.827384] ptrace of non-child pid 2098 was attempted by: firefox-bin (pid 2019)