Bug 56933

Summary: Detected a hung GPU, disabling acceleration.
Product: xorg Reporter: Alfredo Tupone <tupone>
Component: Driver/intelAssignee: Chris Wilson <chris>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.7 (2012.06)   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Output of dmesg
none
i915_error_state
none
Xorg.0.log none

Description Alfredo Tupone 2012-11-09 20:07:00 UTC 
Created attachment 69835 [details]
Output of dmesg

openGL stopped working after GPU hang
Comment 1 Alfredo Tupone 2012-11-09 20:11:18 UTC 
Created attachment 69836 [details]
i915_error_state
Comment 2 Alfredo Tupone 2012-11-09 20:12:13 UTC 
Created attachment 69837 [details]
Xorg.0.log
Comment 3 Alfredo Tupone 2012-11-09 20:14:20 UTC 
Operating System: gentoo
intel driver : xf86-video-intel-2.20.12
X server: xorg-server-1.12.4
Comment 4 Chris Wilson 2012-11-09 20:23:38 UTC 
The indicator here is that IPEHR != *ACTHD, meaning that the GPU is reading stale data and not the batch that was supposedly flushed and coherent.

*** This bug has been marked as a duplicate of bug 26345 ***

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