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[Amit Kucheria <amit.kucheria@xxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

On my Karmic upgrade, Xorg periodically just blanks out (black screen)
and I can never get it back.

Sshing into the machine shows the following attached logs
(/var/log/kern.log)

Jun  6 00:12:59 k2 kernel: [56280.880058] INFO: task events/0:9 blocked for more than 120 seconds.
Jun  6 00:12:59 k2 kernel: [56280.880065] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun  6 00:12:59 k2 kernel: [56280.880072] events/0      D c07bcee0     0     9      2
Jun  6 00:12:59 k2 kernel: [56280.880081]  f7077f1c 00000046 00000001 c07bcee0 f7057284 c07bcee0 c07bcee0 c07bcee0
Jun  6 00:12:59 k2 kernel: [56280.880096]  f7057284 e74cef33 00003311 c07bcee0 f5d616c0 00003311 f7056ff0 f6864414
Jun  6 00:12:59 k2 kernel: [56280.880110]  f6864418 ffffffff f7077f48 c053b356 c06f1340 f686441c f7056ff0 f686441c
Jun  6 00:12:59 k2 kernel: [56280.880124] Call Trace:
Jun  6 00:12:59 k2 kernel: [56280.880139]  [<c053b356>] __mutex_lock_slowpath+0xc6/0x130
Jun  6 00:12:59 k2 kernel: [56280.880148]  [<c053b0d0>] mutex_lock+0x20/0x40
Jun  6 00:12:59 k2 kernel: [56280.880181]  [<f85844da>] i915_gem_retire_work_handler+0x2a/0x70 [i915]
Jun  6 00:12:59 k2 kernel: [56280.880191]  [<c014b8ae>] run_workqueue+0x6e/0x140
Jun  6 00:12:59 k2 kernel: [56280.880215]  [<f85844b0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915]
Jun  6 00:12:59 k2 kernel: [56280.880224]  [<c014ba08>] worker_thread+0x88/0xf0
Jun  6 00:12:59 k2 kernel: [56280.880233]  [<c014f900>] ? autoremove_wake_function+0x0/0x40
Jun  6 00:12:59 k2 kernel: [56280.880241]  [<c014b980>] ? worker_thread+0x0/0xf0
Jun  6 00:12:59 k2 kernel: [56280.880249]  [<c014f5a6>] kthread+0x46/0x80
Jun  6 00:12:59 k2 kernel: [56280.880256]  [<c014f560>] ? kthread+0x0/0x80
Jun  6 00:12:59 k2 kernel: [56280.880265]  [<c0103f57>] kernel_thread_helper+0x7/0x10

ProblemType: Bug
Architecture: i386
Date: Tue Jun  9 00:34:09 2009
DistroRelease: Ubuntu 9.10
MachineType: LENOVO 1703Y1F
Package: xorg 1:7.4~5ubuntu21
ProcCmdLine: root=UUID=c7f80e1a-7946-415c-b54b-8fab9d413770 ro quiet splash  crashkernel=384M-2G:64M@16M,2G-:128M@16M
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
 LC_PAPER=a4
ProcVersionSignature: Ubuntu 2.6.30-8.9-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4~5ubuntu21
 libgl1-mesa-glx 7.4.1-1ubuntu1
 libdrm2 2.4.11-0ubuntu1
 xserver-xorg-video-intel 2:2.7.99.1+git20090602.ec2fde7c-0ubuntu2
 xserver-xorg-video-ati 1:6.12.2-2ubuntu1
SourcePackage: xorg
Uname: Linux 2.6.30-8-generic i686
dmi.bios.date: 03/31/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 7BETD5WW (2.16 )
dmi.board.name: 1703Y1F
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: L3AB437
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7BETD5WW(2.16):bd03/31/2008:svnLENOVO:pn1703Y1F:pvrThinkPadX60s:rvnLENOVO:rn1703Y1F:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 1703Y1F
dmi.product.version: ThinkPad X60s
dmi.sys.vendor: LENOVO
fglrx: Not loaded
system:
 distro:             Ubuntu
 architecture:       i686kernel:             2.6.30-8-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386

-- 
Xorg driver locks up and screen goes blank (black) - i915_gem_retire_work_handler+0x2a/0x70
https://bugs.launchpad.net/bugs/384960
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