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[Bug 383822] Re: [i945GME] Karmic: screensaver causes xorg crash

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: Geir Ove Myhr <gomyhr@xxxxxxxxx>
Date: Sun, 07 Jun 2009 19:27:25 -0000
Reply-to: Bug 383822 <383822@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Summary changed:

- [karmic] screensaver causes xorg lockup
+ [i945GME] Karmic: screensaver causes xorg crash

** Description changed:

  Binary package hint: xserver-xorg-video-intel
  
  Sometimes, when the screensaver is active, hitting a key causes xorg to lock up.  I can still log in; the system itself isn't hung.  Just xorg is hung.  I see the following in the logs:
  Jun  4 07:01:59 nathan kernel: [44520.804137] INFO: task events/1:10 blocked for more than 120 seconds.
  Jun  4 07:01:59 nathan kernel: [44520.804152] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:01:59 nathan kernel: [44520.804165] events/1      D c07bcee0     0    10      2
  Jun  4 07:01:59 nathan kernel: [44520.804184]  f7089f1c 00000046 f57a4000 c07bcee0 f7080294 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:01:59 nathan kernel: [44520.804213]  f7080294 c854fe50 0000285e c07bcee0 f609a8c0 0000285e f7080000 f685d014
  Jun  4 07:01:59 nathan kernel: [44520.804241]  f685d018 ffffffff f7089f48 c053b356 f5793e30 f685d01c f7080000 f685d01c
  Jun  4 07:01:59 nathan kernel: [44520.804268] Call Trace:
  Jun  4 07:01:59 nathan kernel: [44520.804295]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:01:59 nathan kernel: [44520.804313]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:01:59 nathan kernel: [44520.804376]  [<f85894da>] i915_gem_retire_work_handler+0x2a/0x70 [i915]
  Jun  4 07:01:59 nathan kernel: [44520.804397]  [<c014b8ae>] run_workqueue+0x6e/0x140
  Jun  4 07:01:59 nathan kernel: [44520.804450]  [<f85894b0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915]
  Jun  4 07:01:59 nathan kernel: [44520.804468]  [<c014ba08>] worker_thread+0x88/0xf0
  Jun  4 07:01:59 nathan kernel: [44520.804485]  [<c014f900>] ? autoremove_wake_function+0x0/0x40
  Jun  4 07:01:59 nathan kernel: [44520.804501]  [<c014b980>] ? worker_thread+0x0/0xf0
  Jun  4 07:01:59 nathan kernel: [44520.804516]  [<c014f5a6>] kthread+0x46/0x80
  Jun  4 07:01:59 nathan kernel: [44520.804529]  [<c014f560>] ? kthread+0x0/0x80
  Jun  4 07:01:59 nathan kernel: [44520.804546]  [<c0103f57>] kernel_thread_helper+0x7/0x10
  Jun  4 07:01:59 nathan kernel: [44520.804625] INFO: task compiz.real:5982 blocked for more than 120 seconds.
  Jun  4 07:01:59 nathan kernel: [44520.804635] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:01:59 nathan kernel: [44520.804646] compiz.real   D c07bcee0     0  5982   5926
  Jun  4 07:01:59 nathan kernel: [44520.804662]  f57c1dc8 00000082 f67a4000 c07bcee0 f4cf4d34 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:01:59 nathan kernel: [44520.804689]  f4cf4d34 c3164e0f 0000285e c07bcee0 f609ba40 0000285e f4cf4aa0 f685d014
  :Jun  4 07:01:59 nathan kernel: [44520.804716]  f685d018 ffffffff f57c1df4 c053b356 f57c1ed0 f685d01c f4cf4aa0 f7089f30
  Jun  4 07:01:59 nathan kernel: [44520.804743] Call Trace:
  Jun  4 07:01:59 nathan kernel: [44520.804760]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:01:59 nathan kernel: [44520.804776]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:01:59 nathan kernel: [44520.804830]  [<f858b4ea>] i915_gem_gtt_pwrite_fast+0x4a/0x180 [i915]
  Jun  4 07:01:59 nathan kernel: [44520.804901]  [<f82c47fb>] ? drm_gem_object_lookup+0x3b/0x50 [drm]
  Jun  4 07:01:59 nathan kernel: [44520.804955]  [<f858d880>] i915_gem_pwrite_ioctl+0x1a0/0x220 [i915]
  Jun  4 07:01:59 nathan kernel: [44520.805022]  [<f82c372f>] drm_ioctl+0x11f/0x360 [drm]
  Jun  4 07:01:59 nathan kernel: [44520.805077]  [<f858d6e0>] ? i915_gem_pwrite_ioctl+0x0/0x220 [i915]
  Jun  4 07:01:59 nathan kernel: [44520.805096]  [<c0118ab6>] ? lapic_next_event+0x16/0x20
  Jun  4 07:01:59 nathan kernel: [44520.805114]  [<c015c19d>] ? clockevents_program_event+0x8d/0x140
  Jun  4 07:01:59 nathan kernel: [44520.805130]  [<c053c283>] ? _spin_lock_irq+0x13/0x20
  Jun  4 07:01:59 nathan kernel: [44520.805148]  [<c01446b6>] ? run_timer_softirq+0x176/0x200
  Jun  4 07:01:59 nathan kernel: [44520.805166]  [<c0122728>] ? default_spin_lock_flags+0x8/0x10
  Jun  4 07:01:59 nathan kernel: [44520.805182]  [<c053c25a>] ? _spin_lock_irqsave+0x2a/0x40
  Jun  4 07:01:59 nathan kernel: [44520.805201]  [<c0185d70>] ? __rcu_process_callbacks+0x1a0/0x250
  Jun  4 07:01:59 nathan kernel: [44520.805230]  [<c01d84b3>] vfs_ioctl+0x83/0xa0
  Jun  4 07:01:59 nathan kernel: [44520.805245]  [<c01d8942>] do_vfs_ioctl+0x72/0x2d0
  Jun  4 07:01:59 nathan kernel: [44520.805261]  [<c01d8bff>] sys_ioctl+0x5f/0x80
  Jun  4 07:01:59 nathan kernel: [44520.805277]  [<c0118d27>] ? smp_apic_timer_interrupt+0x57/0x90
  Jun  4 07:01:59 nathan kernel: [44520.805293]  [<c010342c>] syscall_call+0x7/0xb
  [...]
  Jun  4 07:02:40 nathan kernel: [44560.989147] ===>rt_ioctl_giwscan. 2(2) BSS returned, data->length = 239
  Jun  4 07:03:59 nathan kernel: [44640.804104] INFO: task events/1:10 blocked for more than 120 seconds.
  Jun  4 07:03:59 nathan kernel: [44640.804120] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:03:59 nathan kernel: [44640.804133] events/1      D c07bcee0     0    10      2
  Jun  4 07:03:59 nathan kernel: [44640.804151]  f7089f1c 00000046 f57a4000 c07bcee0 f7080294 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:03:59 nathan kernel: [44640.804180]  f7080294 c854fe50 0000285e c07bcee0 f609a8c0 0000285e f7080000 f685d014
  Jun  4 07:03:59 nathan kernel: [44640.804208]  f685d018 ffffffff f7089f48 c053b356 f5793e30 f685d01c f7080000 f685d01c
  Jun  4 07:03:59 nathan kernel: [44640.804235] Call Trace:
  Jun  4 07:03:59 nathan kernel: [44640.804263]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:03:59 nathan kernel: [44640.804280]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:03:59 nathan kernel: [44640.804344]  [<f85894da>] i915_gem_retire_work_handler+0x2a/0x70 [i915]
  Jun  4 07:03:59 nathan kernel: [44640.804364]  [<c014b8ae>] run_workqueue+0x6e/0x140
  Jun  4 07:03:59 nathan kernel: [44640.804418]  [<f85894b0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915]
  Jun  4 07:03:59 nathan kernel: [44640.804436]  [<c014ba08>] worker_thread+0x88/0xf0
  Jun  4 07:03:59 nathan kernel: [44640.804453]  [<c014f900>] ? autoremove_wake_function+0x0/0x40
  Jun  4 07:03:59 nathan kernel: [44640.804469]  [<c014b980>] ? worker_thread+0x0/0xf0
  Jun  4 07:03:59 nathan kernel: [44640.804483]  [<c014f5a6>] kthread+0x46/0x80
  Jun  4 07:03:59 nathan kernel: [44640.804497]  [<c014f560>] ? kthread+0x0/0x80
  Jun  4 07:03:59 nathan kernel: [44640.804514]  [<c0103f57>] kernel_thread_helper+0x7/0x10
  Jun  4 07:03:59 nathan kernel: [44640.804593] INFO: task compiz.real:5982 blocked for more than 120 seconds.
  Jun  4 07:03:59 nathan kernel: [44640.804603] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:03:59 nathan kernel: [44640.804614] compiz.real   D c07bcee0     0  5982   5926
  Jun  4 07:03:59 nathan kernel: [44640.804630]  f57c1dc8 00000082 f67a4000 c07bcee0 f4cf4d34 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:03:59 nathan kernel: [44640.804657]  f4cf4d34 c3164e0f 0000285e c07bcee0 f609ba40 0000285e f4cf4aa0 f685d014
  Jun  4 07:03:59 nathan kernel: [44640.804684]  f685d018 ffffffff f57c1df4 c053b356 f57c1ed0 f685d01c f4cf4aa0 f7089f30
  Jun  4 07:03:59 nathan kernel: [44640.804711] Call Trace:
  Jun  4 07:03:59 nathan kernel: [44640.804728]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:03:59 nathan kernel: [44640.804744]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:03:59 nathan kernel: [44640.804799]  [<f858b4ea>] i915_gem_gtt_pwrite_fast+0x4a/0x180 [i915]
  Jun  4 07:03:59 nathan kernel: [44640.804869]  [<f82c47fb>] ? drm_gem_object_lookup+0x3b/0x50 [drm]
  Jun  4 07:03:59 nathan kernel: [44640.804923]  [<f858d880>] i915_gem_pwrite_ioctl+0x1a0/0x220 [i915]
  Jun  4 07:03:59 nathan kernel: [44640.804990]  [<f82c372f>] drm_ioctl+0x11f/0x360 [drm]
  Jun  4 07:03:59 nathan kernel: [44640.805045]  [<f858d6e0>] ? i915_gem_pwrite_ioctl+0x0/0x220 [i915]
  Jun  4 07:03:59 nathan kernel: [44640.805065]  [<c0118ab6>] ? lapic_next_event+0x16/0x20
  Jun  4 07:03:59 nathan kernel: [44640.805082]  [<c015c19d>] ? clockevents_program_event+0x8d/0x140
  Jun  4 07:03:59 nathan kernel: [44640.805099]  [<c053c283>] ? _spin_lock_irq+0x13/0x20
  Jun  4 07:03:59 nathan kernel: [44640.805116]  [<c01446b6>] ? run_timer_softirq+0x176/0x200
  Jun  4 07:03:59 nathan kernel: [44640.805135]  [<c0122728>] ? default_spin_lock_flags+0x8/0x10
  Jun  4 07:03:59 nathan kernel: [44640.805151]  [<c053c25a>] ? _spin_lock_irqsave+0x2a/0x40
  Jun  4 07:03:59 nathan kernel: [44640.805169]  [<c0185d70>] ? __rcu_process_callbacks+0x1a0/0x250
  Jun  4 07:03:59 nathan kernel: [44640.805198]  [<c01d84b3>] vfs_ioctl+0x83/0xa0
  Jun  4 07:03:59 nathan kernel: [44640.805214]  [<c01d8942>] do_vfs_ioctl+0x72/0x2d0
  Jun  4 07:03:59 nathan kernel: [44640.805229]  [<c01d8bff>] sys_ioctl+0x5f/0x80
  Jun  4 07:03:59 nathan kernel: [44640.805245]  [<c0118d27>] ? smp_apic_timer_interrupt+0x57/0x90
  Jun  4 07:03:59 nathan kernel: [44640.805262]  [<c010342c>] syscall_call+0x7/0xb
  Jun  4 07:04:40 nathan wpa_supplicant[4024]: CTRL-EVENT-SCAN-RESULTS 
  Jun  4 07:04:40 nathan kernel: [44680.989172] ===>rt_ioctl_giwscan. 3(3) BSS returned, data->length = 398
  Jun  4 07:05:59 nathan kernel: [44760.804084] INFO: task events/1:10 blocked for more than 120 seconds.
  Jun  4 07:05:59 nathan kernel: [44760.804100] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:05:59 nathan kernel: [44760.804112] events/1      D c07bcee0     0    10      2
  Jun  4 07:05:59 nathan kernel: [44760.804130]  f7089f1c 00000046 f57a4000 c07bcee0 f7080294 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:05:59 nathan kernel: [44760.804160]  f7080294 c854fe50 0000285e c07bcee0 f609a8c0 0000285e f7080000 f685d014
  Jun  4 07:05:59 nathan kernel: [44760.804187]  f685d018 ffffffff f7089f48 c053b356 f5793e30 f685d01c f7080000 f685d01c
  Jun  4 07:05:59 nathan kernel: [44760.804215] Call Trace:
  Jun  4 07:05:59 nathan kernel: [44760.804242]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:05:59 nathan kernel: [44760.804260]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:05:59 nathan kernel: [44760.804324]  [<f85894da>] i915_gem_retire_work_handler+0x2a/0x70 [i915]
  Jun  4 07:05:59 nathan kernel: [44760.804344]  [<c014b8ae>] run_workqueue+0x6e/0x140
  Jun  4 07:05:59 nathan kernel: [44760.804397]  [<f85894b0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915]
  Jun  4 07:05:59 nathan kernel: [44760.804415]  [<c014ba08>] worker_thread+0x88/0xf0
  Jun  4 07:05:59 nathan kernel: [44760.804432]  [<c014f900>] ? autoremove_wake_function+0x0/0x40
  Jun  4 07:05:59 nathan kernel: [44760.804448]  [<c014b980>] ? worker_thread+0x0/0xf0
  Jun  4 07:05:59 nathan kernel: [44760.804463]  [<c014f5a6>] kthread+0x46/0x80
  Jun  4 07:05:59 nathan kernel: [44760.804476]  [<c014f560>] ? kthread+0x0/0x80
  Jun  4 07:05:59 nathan kernel: [44760.804493]  [<c0103f57>] kernel_thread_helper+0x7/0x10
  Jun  4 07:05:59 nathan kernel: [44760.804573] INFO: task compiz.real:5982 blocked for more than 120 seconds.
  Jun  4 07:05:59 nathan kernel: [44760.804583] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:05:59 nathan kernel: [44760.804594] compiz.real   D c07bcee0     0  5982   5926
  Jun  4 07:05:59 nathan kernel: [44760.804610]  f57c1dc8 00000082 f67a4000 c07bcee0 f4cf4d34 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:05:59 nathan kernel: [44760.804637]  f4cf4d34 c3164e0f 0000285e c07bcee0 f609ba40 0000285e f4cf4aa0 f685d014
  Jun  4 07:05:59 nathan kernel: [44760.804665]  f685d018 ffffffff f57c1df4 c053b356 f57c1ed0 f685d01c f4cf4aa0 f7089f30
  Jun  4 07:05:59 nathan kernel: [44760.804691] Call Trace:
  Jun  4 07:05:59 nathan kernel: [44760.804708]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:05:59 nathan kernel: [44760.804724]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:05:59 nathan kernel: [44760.804779]  [<f858b4ea>] i915_gem_gtt_pwrite_fast+0x4a/0x180 [i915]
  Jun  4 07:05:59 nathan kernel: [44760.804849]  [<f82c47fb>] ? drm_gem_object_lookup+0x3b/0x50 [drm]
  Jun  4 07:05:59 nathan kernel: [44760.804904]  [<f858d880>] i915_gem_pwrite_ioctl+0x1a0/0x220 [i915]
  Jun  4 07:05:59 nathan kernel: [44760.804971]  [<f82c372f>] drm_ioctl+0x11f/0x360 [drm]
  Jun  4 07:05:59 nathan kernel: [44760.805025]  [<f858d6e0>] ? i915_gem_pwrite_ioctl+0x0/0x220 [i915]
  Jun  4 07:05:59 nathan kernel: [44760.805057]  [<c0118ab6>] ? lapic_next_event+0x16/0x20
  Jun  4 07:05:59 nathan kernel: [44760.805080]  [<c015c19d>] ? clockevents_program_event+0x8d/0x140
  Jun  4 07:05:59 nathan kernel: [44760.805104]  [<c053c283>] ? _spin_lock_irq+0x13/0x20
  Jun  4 07:05:59 nathan kernel: [44760.805123]  [<c01446b6>] ? run_timer_softirq+0x176/0x200
  Jun  4 07:05:59 nathan kernel: [44760.805142]  [<c0122728>] ? default_spin_lock_flags+0x8/0x10
  Jun  4 07:05:59 nathan kernel: [44760.805158]  [<c053c25a>] ? _spin_lock_irqsave+0x2a/0x40
  Jun  4 07:05:59 nathan kernel: [44760.805176]  [<c0185d70>] ? __rcu_process_callbacks+0x1a0/0x250
  Jun  4 07:05:59 nathan kernel: [44760.805206]  [<c01d84b3>] vfs_ioctl+0x83/0xa0
  Jun  4 07:05:59 nathan kernel: [44760.805222]  [<c01d8942>] do_vfs_ioctl+0x72/0x2d0
  Jun  4 07:05:59 nathan kernel: [44760.805237]  [<c01d8bff>] sys_ioctl+0x5f/0x80
  Jun  4 07:05:59 nathan kernel: [44760.805253]  [<c0118d27>] ? smp_apic_timer_interrupt+0x57/0x90
  Jun  4 07:05:59 nathan kernel: [44760.805270]  [<c010342c>] syscall_call+0x7/0xb
  Jun  4 07:06:36 nathan wpa_supplicant[4024]: WPA: Group rekeying completed with 00:0f:66:51:1d:68 [GTK=CCMP]
  Jun  4 07:06:36 nathan NetworkManager: <info>  (ra0): supplicant connection state:  completed -> group handshake 
  Jun  4 07:06:36 nathan NetworkManager: <info>  (ra0): supplicant connection state:  group handshake -> completed 
  Jun  4 07:06:40 nathan wpa_supplicant[4024]: CTRL-EVENT-SCAN-RESULTS 
  Jun  4 07:06:40 nathan kernel: [44800.987585] ===>rt_ioctl_giwscan. 3(3) BSS returned, data->length = 398
  Jun  4 07:07:59 nathan kernel: [44880.804093] INFO: task events/1:10 blocked for more than 120 seconds.
  Jun  4 07:07:59 nathan kernel: [44880.804109] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:07:59 nathan kernel: [44880.804122] events/1      D c07bcee0     0    10      2
  Jun  4 07:07:59 nathan kernel: [44880.804140]  f7089f1c 00000046 f57a4000 c07bcee0 f7080294 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:07:59 nathan kernel: [44880.804169]  f7080294 c854fe50 0000285e c07bcee0 f609a8c0 0000285e f7080000 f685d014
  Jun  4 07:07:59 nathan kernel: [44880.804197]  f685d018 ffffffff f7089f48 c053b356 f5793e30 f685d01c f7080000 f685d01c
  Jun  4 07:07:59 nathan kernel: [44880.804224] Call Trace:
  Jun  4 07:07:59 nathan kernel: [44880.804252]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:07:59 nathan kernel: [44880.804269]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:07:59 nathan kernel: [44880.804333]  [<f85894da>] i915_gem_retire_work_handler+0x2a/0x70 [i915]
  Jun  4 07:07:59 nathan kernel: [44880.804354]  [<c014b8ae>] run_workqueue+0x6e/0x140
  Jun  4 07:07:59 nathan kernel: [44880.804407]  [<f85894b0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915]
  Jun  4 07:07:59 nathan kernel: [44880.804425]  [<c014ba08>] worker_thread+0x88/0xf0
  Jun  4 07:07:59 nathan kernel: [44880.804441]  [<c014f900>] ? autoremove_wake_function+0x0/0x40
  Jun  4 07:07:59 nathan kernel: [44880.804458]  [<c014b980>] ? worker_thread+0x0/0xf0
  Jun  4 07:07:59 nathan kernel: [44880.804472]  [<c014f5a6>] kthread+0x46/0x80
  Jun  4 07:07:59 nathan kernel: [44880.804486]  [<c014f560>] ? kthread+0x0/0x80
  Jun  4 07:07:59 nathan kernel: [44880.804502]  [<c0103f57>] kernel_thread_helper+0x7/0x10
  Jun  4 07:07:59 nathan kernel: [44880.804582] INFO: task compiz.real:5982 blocked for more than 120 seconds.
  Jun  4 07:07:59 nathan kernel: [44880.804592] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:07:59 nathan kernel: [44880.804603] compiz.real   D c07bcee0     0  5982   5926
  Jun  4 07:07:59 nathan kernel: [44880.804618]  f57c1dc8 00000082 f67a4000 c07bcee0 f4cf4d34 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:07:59 nathan kernel: [44880.804646]  f4cf4d34 c3164e0f 0000285e c07bcee0 f609ba40 0000285e f4cf4aa0 f685d014
  Jun  4 07:07:59 nathan kernel: [44880.804673]  f685d018 ffffffff f57c1df4 c053b356 f57c1ed0 f685d01c f4cf4aa0 f7089f30
  Jun  4 07:07:59 nathan kernel: [44880.804700] Call Trace:
  Jun  4 07:07:59 nathan kernel: [44880.804717]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:07:59 nathan kernel: [44880.804733]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:07:59 nathan kernel: [44880.804788]  [<f858b4ea>] i915_gem_gtt_pwrite_fast+0x4a/0x180 [i915]
  Jun  4 07:07:59 nathan kernel: [44880.804858]  [<f82c47fb>] ? drm_gem_object_lookup+0x3b/0x50 [drm]
  Jun  4 07:07:59 nathan kernel: [44880.804913]  [<f858d880>] i915_gem_pwrite_ioctl+0x1a0/0x220 [i915]
  Jun  4 07:07:59 nathan kernel: [44880.804980]  [<f82c372f>] drm_ioctl+0x11f/0x360 [drm]
  Jun  4 07:07:59 nathan kernel: [44880.805035]  [<f858d6e0>] ? i915_gem_pwrite_ioctl+0x0/0x220 [i915]
  Jun  4 07:07:59 nathan kernel: [44880.805068]  [<c0118ab6>] ? lapic_next_event+0x16/0x20
  Jun  4 07:07:59 nathan kernel: [44880.805091]  [<c015c19d>] ? clockevents_program_event+0x8d/0x140
  Jun  4 07:07:59 nathan kernel: [44880.805112]  [<c053c283>] ? _spin_lock_irq+0x13/0x20
  Jun  4 07:07:59 nathan kernel: [44880.805136]  [<c01446b6>] ? run_timer_softirq+0x176/0x200
  Jun  4 07:07:59 nathan kernel: [44880.805159]  [<c0122728>] ? default_spin_lock_flags+0x8/0x10
  Jun  4 07:07:59 nathan kernel: [44880.805175]  [<c053c25a>] ? _spin_lock_irqsave+0x2a/0x40
  Jun  4 07:07:59 nathan kernel: [44880.805194]  [<c0185d70>] ? __rcu_process_callbacks+0x1a0/0x250
  Jun  4 07:07:59 nathan kernel: [44880.805223]  [<c01d84b3>] vfs_ioctl+0x83/0xa0
  Jun  4 07:07:59 nathan kernel: [44880.805239]  [<c01d8942>] do_vfs_ioctl+0x72/0x2d0
  Jun  4 07:07:59 nathan kernel: [44880.805254]  [<c01d8bff>] sys_ioctl+0x5f/0x80
  Jun  4 07:07:59 nathan kernel: [44880.805270]  [<c0118d27>] ? smp_apic_timer_interrupt+0x57/0x90
  Jun  4 07:07:59 nathan kernel: [44880.805287]  [<c010342c>] syscall_call+0x7/0xb
  Jun  4 07:08:40 nathan wpa_supplicant[4024]: CTRL-EVENT-SCAN-RESULTS 
  Jun  4 07:08:40 nathan kernel: [44920.986908] ===>rt_ioctl_giwscan. 2(2) BSS returned, data->length = 239
  Jun  4 07:09:59 nathan kernel: [45000.804174] INFO: task events/1:10 blocked for more than 120 seconds.
  Jun  4 07:09:59 nathan kernel: [45000.804194] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:09:59 nathan kernel: [45000.804211] events/1      D c07bcee0     0    10      2
  Jun  4 07:09:59 nathan kernel: [45000.804236]  f7089f1c 00000046 f57a4000 c07bcee0 f7080294 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:09:59 nathan kernel: [45000.804277]  f7080294 c854fe50 0000285e c07bcee0 f609a8c0 0000285e f7080000 f685d014
  Jun  4 07:09:59 nathan kernel: [45000.804317]  f685d018 ffffffff f7089f48 c053b356 f5793e30 f685d01c f7080000 f685d01c
  Jun  4 07:09:59 nathan kernel: [45000.804358] Call Trace:
  Jun  4 07:09:59 nathan kernel: [45000.804392]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:09:59 nathan kernel: [45000.804414]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:09:59 nathan kernel: [45000.804493]  [<f85894da>] i915_gem_retire_work_handler+0x2a/0x70 [i915]
  Jun  4 07:09:59 nathan kernel: [45000.804519]  [<c014b8ae>] run_workqueue+0x6e/0x140
  Jun  4 07:09:59 nathan kernel: [45000.804588]  [<f85894b0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915]
  Jun  4 07:09:59 nathan kernel: [45000.804611]  [<c014ba08>] worker_thread+0x88/0xf0
  Jun  4 07:09:59 nathan kernel: [45000.804633]  [<c014f900>] ? autoremove_wake_function+0x0/0x40
  Jun  4 07:09:59 nathan kernel: [45000.804655]  [<c014b980>] ? worker_thread+0x0/0xf0
  Jun  4 07:09:59 nathan kernel: [45000.804674]  [<c014f5a6>] kthread+0x46/0x80
  Jun  4 07:09:59 nathan kernel: [45000.804692]  [<c014f560>] ? kthread+0x0/0x80
  Jun  4 07:09:59 nathan kernel: [45000.804713]  [<c0103f57>] kernel_thread_helper+0x7/0x10
  Jun  4 07:09:59 nathan kernel: [45000.804798] INFO: task compiz.real:5982 blocked for more than 120 seconds.
  Jun  4 07:09:59 nathan kernel: [45000.804812] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun  4 07:09:59 nathan kernel: [45000.804827] compiz.real   D c07bcee0     0  5982   5926
  Jun  4 07:09:59 nathan kernel: [45000.804848]  f57c1dc8 00000082 f67a4000 c07bcee0 f4cf4d34 c07bcee0 c07bcee0 c07bcee0
  Jun  4 07:09:59 nathan kernel: [45000.804886]  f4cf4d34 c3164e0f 0000285e c07bcee0 f609ba40 0000285e f4cf4aa0 f685d014
  Jun  4 07:09:59 nathan kernel: [45000.804925]  f685d018 ffffffff f57c1df4 c053b356 f57c1ed0 f685d01c f4cf4aa0 f7089f30
  Jun  4 07:09:59 nathan kernel: [45000.804963] Call Trace:
  Jun  4 07:09:59 nathan kernel: [45000.804985]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
  Jun  4 07:09:59 nathan kernel: [45000.805006]  [<c053b0d0>] mutex_lock+0x20/0x40
  Jun  4 07:09:59 nathan kernel: [45000.805076]  [<f858b4ea>] i915_gem_gtt_pwrite_fast+0x4a/0x180 [i915]
  Jun  4 07:09:59 nathan kernel: [45000.805166]  [<f82c47fb>] ? drm_gem_object_lookup+0x3b/0x50 [drm]
  Jun  4 07:09:59 nathan kernel: [45000.805234]  [<f858d880>] i915_gem_pwrite_ioctl+0x1a0/0x220 [i915]
  Jun  4 07:09:59 nathan kernel: [45000.805320]  [<f82c372f>] drm_ioctl+0x11f/0x360 [drm]
  Jun  4 07:09:59 nathan kernel: [45000.805386]  [<f858d6e0>] ? i915_gem_pwrite_ioctl+0x0/0x220 [i915]
  Jun  4 07:09:59 nathan kernel: [45000.805411]  [<c0118ab6>] ? lapic_next_event+0x16/0x20
  Jun  4 07:09:59 nathan kernel: [45000.805433]  [<c015c19d>] ? clockevents_program_event+0x8d/0x140
  Jun  4 07:09:59 nathan kernel: [45000.805455]  [<c053c283>] ? _spin_lock_irq+0x13/0x20
  Jun  4 07:09:59 nathan kernel: [45000.805477]  [<c01446b6>] ? run_timer_softirq+0x176/0x200
  Jun  4 07:09:59 nathan kernel: [45000.805501]  [<c0122728>] ? default_spin_lock_flags+0x8/0x10
  Jun  4 07:09:59 nathan kernel: [45000.805522]  [<c053c25a>] ? _spin_lock_irqsave+0x2a/0x40
  Jun  4 07:09:59 nathan kernel: [45000.805546]  [<c0185d70>] ? __rcu_process_callbacks+0x1a0/0x250
  Jun  4 07:09:59 nathan kernel: [45000.805580]  [<c01d84b3>] vfs_ioctl+0x83/0xa0
  Jun  4 07:09:59 nathan kernel: [45000.805601]  [<c01d8942>] do_vfs_ioctl+0x72/0x2d0
  Jun  4 07:09:59 nathan kernel: [45000.805623]  [<c01d8bff>] sys_ioctl+0x5f/0x80
  Jun  4 07:09:59 nathan kernel: [45000.805645]  [<c0118d27>] ? smp_apic_timer_interrupt+0x57/0x90
  Jun  4 07:09:59 nathan kernel: [45000.805668]  [<c010342c>] syscall_call+0x7/0xb
  
  versions installed:
  ii  xorg                                                 1:7.4~5ubuntu21                          X.Org X Window System
  ii  xserver-xorg                                         1:7.4~5ubuntu21                          the X.Org X server
  ii  xserver-xorg-core                                    2:1.6.1.901-2ubuntu1                     Xorg X server - core server
  ii  xserver-xorg-core-dbg                                2:1.6.1.901-2ubuntu1                     Xorg - the X.Org X server (debugging symbols
  ii  xserver-xorg-video-intel                             2:2.7.99.1+git20090602.ec2fde7c-0ubuntu2 X.Org X server -- Intel i8xx, i9xx display d
  ii  xserver-xorg-video-intel-dbg                         2:2.7.99.1+git20090602.ec2fde7c-0ubuntu2 X.Org X server -- Intel i8xx, i9xx display d
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GME Express Memory Controller Hub [8086:27ac] (rev 03)
+ 	Subsystem: ASUSTeK Computer Inc. Device [1043:830f]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GME Express Integrated Graphics Controller [8086:27ae] (rev 03)
+ 	Subsystem: ASUSTeK Computer Inc. Device [1043:830f]

-- 
[i945GME] Karmic: screensaver causes xorg crash
https://bugs.launchpad.net/bugs/383822
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References

[Bug 383822] [NEW] [karmic] screensaver causes xorg lockup
From: GiuseppeVerde, 2009-06-05