FS#31050 - [intel-dri] Screen updates randomly start rendering slowly

Attached to Project: Arch Linux
Opened by Excitable Snowball (excitablesnowball) - Tuesday, 07 August 2012, 18:36 GMT
Last edited by Andreas Radke (AndyRTR) - Saturday, 15 September 2012, 07:52 GMT
Task Type Bug Report
Category Upstream Bugs
Status Closed
Assigned To Jan de Groot (JGC)
Andreas Radke (AndyRTR)
Architecture x86_64
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:
Screen updates start rendering very slowly, both in X and in the virtual terminals. In /var/log/messages.log, I see "WARNING: at drivers/gpu/drm/i915/i915_drv.c:398 gen6_gt_check_fifodbg.isra.3+0x40/0x50 [i915]()" and a call trace (repeated many times).

Additional info:
* 8.0.4-2
* I attached the relevant section of /var/log/messages.log. The portion I attached is repeated a bunch of times. One of the messages is "capturing error event; look for more information in /debug/dri/0/i915_error_state", but I couldn't find any file called i915_error_state. I'll attach that if someone can help me find it.

Steps to reproduce:
Unfortunately, I don't know how to reproduce the issue. It's happened twice so far, the first time was last week sometime. If there are any other log files I should grab next time it happens, let me know.
   messages.log (3.9 KiB)
This task depends upon

Closed by  Andreas Radke (AndyRTR)
Saturday, 15 September 2012, 07:52 GMT
Reason for closing:  Upstream
Comment by Excitable Snowball (excitablesnowball) - Tuesday, 07 August 2012, 18:41 GMT
The previous time this happened, I was running i686. When it happened just now, I was running x86_64. (So the issue is probably independent of architecture)

Also,
$ lspci | grep Graphics
2:00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

This is a Lenovo ThinkPad T520i 4239CTO.
Comment by Jelle van der Waa (jelly) - Tuesday, 07 August 2012, 19:47 GMT
Report it upstream
Comment by Excitable Snowball (excitablesnowball) - Tuesday, 07 August 2012, 19:58 GMT
Ok. Do you know if this is the proper upstream bug tracker? https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa
Comment by Karol Błażewicz (karol) - Tuesday, 07 August 2012, 21:28 GMT
Check the output of 'dmesg', this looks like a hung GPU:
(EE) intel(0): Detected a hung GPU, disabling acceleration.

If it's indeed hung GPU then I think you should report a bug against the intel drivers.
Read http://intellinuxgraphics.org/how_to_report_bug.html and http://intellinuxgraphics.org/i915_error_state.html especially.
Comment by Jelle van der Waa (jelly) - Thursday, 16 August 2012, 19:18 GMT
Did anybody informed upstream?
Comment by Excitable Snowball (excitablesnowball) - Thursday, 16 August 2012, 20:36 GMT
No. I'm waiting for it to happen again, since I don't have enough information right now to debug the problem (based on the "How to file a good bug report" page Karol linked).

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