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[39805.130277] [drm:i915_wait_request] *ERROR* something (likely
vbetool) disabled interrupts, re-enabling


May 21 14:35:36 ghostdog kernel: [100010.488058] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
May 21 14:35:36 ghostdog kernel: [100010.488071] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
May 21 14:35:36 ghostdog kernel: [100010.489481] [drm:i915_wait_request] *ERROR* i915_wait_request returns -11 (awaiting 2272058 at 2272030, next 2272083)
May 21 14:35:36 ghostdog kernel: [100010.490408] [drm:init_ring_common] *ERROR* render ring initialization failed ctl 00000000 head 00000000 tail 00000000 start 00000000
May 21 14:35:36 ghostdog kernel: [100010.490941] [drm] Changing LVDS panel from (+hsync, +vsync) to (-hsync, -vsync)
May 21 14:35:36 ghostdog kernel: [100010.491098] ------------[ cut here ]------------
May 21 14:35:36 ghostdog kernel: [100010.491153] WARNING: at /build/buildd/linux-3.2.0/drivers/gpu/drm/i915/intel_display.c:793 intel_enable_pipe+0x144/0x150 [i915]()
May 21 14:35:36 ghostdog kernel: [100010.491161] Hardware name: 7650DHU
May 21 14:35:36 ghostdog kernel: [100010.491165] PLL state assertion failure (expected on, current off)
May 21 14:35:36 ghostdog kernel: [100010.491170] Modules linked in: cdc_acm nls_iso8859_1 nls_cp437 vfat fat usb_storage snd_hrtimer bnep rfcomm parport_pc ppdev binfmt_misc arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi pcmcia snd_seq_midi_event snd_seq psmouse snd_timer serio_raw snd_seq_device thinkpad_acpi nvram iwl4965 iwl_legacy yenta_socket pcmcia_rsrc pcmcia_core mac80211 btusb cfg80211 mac_hid bluetooth snd i915 drm_kms_helper drm i2c_algo_bit coretemp video soundcore snd_page_alloc lp parport tg3 [last unloaded: cdc_acm]
May 21 14:35:36 ghostdog kernel: [100010.491276] Pid: 11567, comm: kworker/u:1 Tainted: G        W    3.2.0-24-generic #37-Ubuntu
May 21 14:35:36 ghostdog kernel: [100010.491283] Call Trace:
May 21 14:35:36 ghostdog kernel: [100010.491302]  [<c104b182>] warn_slowpath_common+0x72/0xa0
May 21 14:35:36 ghostdog kernel: [100010.491345]  [<f8355744>] ? intel_enable_pipe+0x144/0x150 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491386]  [<f8355744>] ? intel_enable_pipe+0x144/0x150 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491396]  [<c104b253>] warn_slowpath_fmt+0x33/0x40
May 21 14:35:36 ghostdog kernel: [100010.491438]  [<f8355744>] intel_enable_pipe+0x144/0x150 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491484]  [<f8358988>] i9xx_crtc_mode_set+0x688/0xc60 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491518]  [<f82075ec>] ? vblank_disable_and_save+0x16c/0x190 [drm]
May 21 14:35:36 ghostdog kernel: [100010.491561]  [<f83522bc>] intel_crtc_mode_set+0x5c/0x90 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491581]  [<f8140b72>] drm_crtc_helper_set_mode+0x2a2/0x470 [drm_kms_helper]
May 21 14:35:36 ghostdog kernel: [100010.491606]  [<f8140dad>] drm_helper_resume_force_mode+0x6d/0x140 [drm_kms_helper]
May 21 14:35:36 ghostdog kernel: [100010.491639]  [<f8334231>] i915_reset+0x211/0x2d0 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491672]  [<f83385fe>] i915_error_work_func+0xae/0xf0 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491692]  [<c10652a1>] process_one_work+0x101/0x3a0
May 21 14:35:36 ghostdog kernel: [100010.491703]  [<c1577359>] ? apic_timer_interrupt+0x31/0x38
May 21 14:35:36 ghostdog kernel: [100010.491736]  [<f8338550>] ? i915_driver_irq_postinstall+0x170/0x170 [i915]
May 21 14:35:36 ghostdog kernel: [100010.491746]  [<c1065d64>] worker_thread+0x124/0x2d0
May 21 14:35:36 ghostdog kernel: [100010.491756]  [<c1065c40>] ? manage_workers.isra.27+0x110/0x110
May 21 14:35:36 ghostdog kernel: [100010.491766]  [<c1069b8d>] kthread+0x6d/0x80
May 21 14:35:36 ghostdog kernel: [100010.491774]  [<c1069b20>] ? flush_kthread_worker+0x80/0x80
May 21 14:35:36 ghostdog kernel: [100010.491784]  [<c157e37e>] kernel_thread_helper+0x6/0x10
May 21 14:35:36 ghostdog kernel: [100010.491791] ---[ end trace 69f94361aa03fe13 ]---

Sometimes (usually once or twice a day) the screen goes completely off
and can't be turned back on. The rest of the system seems to be running
normally (not 100% sure about this, since I can't see anything). Only
way to restore it is hard reboot.

Not sure what triggers this, it seems quite random to me. Most of the
time when this happens (not always though), is when some app that uses
opengl is running.

I'm using ubuntu 12.04 with unity-2d. My graphics card is: "Intel
Corporation Mobile GM965/GL960 Integrated Graphics Controller".

bug 507504  bug 881867
--- 
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
PackageArchitecture: i386
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Tags:  precise
Uname: Linux 3.2.0-24-generic i686
UpgradeStatus: Upgraded to precise on 2012-05-13 (13 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
--- 
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
PackageArchitecture: i386
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Tags:  precise
Uname: Linux 3.2.0-24-generic i686
UpgradeStatus: Upgraded to precise on 2012-05-13 (15 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
--- 
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
PackageArchitecture: i386
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Tags:  precise
Uname: Linux 3.2.0-24-generic i686
UpgradeStatus: Upgraded to precise on 2012-05-13 (15 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: apport-collected bot-comment precise
-- 
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
https://bugs.launchpad.net/bugs/1002284
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