Bug 22318

Summary: kernel oops when laptop screen is switched off
Product: xorg Reporter: Chris Jones <cmsj>
Component: Driver/intelAssignee: MaLing <ling.ma>
Status: RESOLVED NOTABUG QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: jbarnes
Version: 7.4 (2008.09)Keywords: NEEDINFO
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
syslog snippet containing oopses. none

Description Chris Jones 2009-06-16 09:00:52 UTC 
Created attachment 26858 [details]
syslog snippet containing oopses.

first reported at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/384865 this appears on thinkpad X200 and X300 which are GM45 and GM965 respectively.

both reporters running x86-64 versions of Ubuntu Karmic (2.6.30-8 and -9, intel driver 2.7.99.1+git20090602.ec2fde7c-0ubuntu2, xorg 7.4)

It seems that sometimes when DPMS is activated, something gets wedged and the kernel prints some backtraces. The original reporter saw this with a kernel version which I'm pretty sure worked fine for me for the week I was using it, but I upgraded today and saw it with 2.6.30-9-generic.

Attached is the portion of my syslog which contained the oopses.
Comment 1 Bryce Harrington 2009-06-17 11:08:23 UTC 

*** This bug has been marked as a duplicate of bug 22336 ***
Comment 2 Eric Anholt 2009-06-17 11:35:12 UTC 
Not a duplicate just because of the backtrace.

This sort of GPU hang needs intel_gpu_dump output for us to make any progress.
Comment 3 Yifei Chen 2009-06-29 00:48:55 UTC 
We tested on Thinkpad X200 with Ubuntu Jaunty 64bit and kernel: (drm-intel-next)b5aa8a0fc132dd512c33e7c2621d075e3b77a65e and xorg stack from xorg-edger PPA with version: 2:2.7.99.901+git20090624.f0270bbb-0ubuntu0sarvatt~jaunty. It works just fine either with screen blanks for inactivity or xset dpms force off.
Comment 4 MaLing 2009-06-30 02:04:13 UTC 
After verification, we don't find the issue reproduce, so close it. Pls open it if you need.

Thanks
Ma Ling

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