Bug 98607 - [SKL] display blacks for 2 seconds and dmesg says "*ERROR* CPU pipe B FIFO underrun"
Summary: [SKL] display blacks for 2 seconds and dmesg says "*ERROR* CPU pipe B FIFO un...
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium major
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-11-06 08:54 UTC by Jiri Pirko
Modified: 2017-03-28 16:34 UTC (History)
3 users (show)

See Also:
i915 platform: SKL
i915 features: display/watermark


Attachments
dmesg with debug output (249.82 KB, text/plain)
2016-11-06 08:54 UTC, Jiri Pirko
no flags Details

Description Jiri Pirko 2016-11-06 08:54:33 UTC
Created attachment 127796 [details]
dmesg with debug output

From time to time (once every 2 hours), during the work (key press??), display blacks for ~2seconds. After that, everything restores an is fine again.

Once that happens, dmesg says:
*ERROR* CPU pipe B FIFO underrun

Dmesg with debug output is attached.

Kernel:
4.8.4-200.fc24.x86_64

I tried to run intel-drm kernel but I was consistently getting "double free" error during boot-up.
Comment 1 Jani Saarinen 2016-12-09 10:03:38 UTC
Is this still issue?
Comment 2 Cedric M 2017-01-10 13:43:31 UTC
Seems very similar to 97264 (in my case, it's just happening much more frequently, maybe due to a greater count of pixels).

If it's the same bug, yes, it's still present.
Comment 3 Jiri Pirko 2017-01-10 14:51:42 UTC
I don't see this issue anymore on 4.8.15-200.fc24.x86_64
Comment 4 Cedric M 2017-01-10 15:11:54 UTC
Lucky you ;)
Still have the issue reported at 97264 on 4.10.0-041000rc3-generic
Comment 5 Jani Saarinen 2017-03-08 07:39:14 UTC
With latest changes on atomic/WM work can you still reproduce on drm-tip?
Comment 6 Cedric M 2017-03-08 11:42:14 UTC
Hey,

I have been playing with drm-tip for an hour: so far so good! :)

Thanks,
Cedric
Comment 7 Jani Saarinen 2017-03-28 15:49:31 UTC
Cedric, any updates, good now?
Comment 8 Cedric M 2017-03-28 15:53:11 UTC
Yes, no blanking anymore ! :-)
Didn't try any newer kernel since though.
I guess that it's going to be merged in stock 4.12 ?


Still get occasional lockups (mouse ultra slow to move/huge lag, everything else frozen), but I guess that it's not related to this bug.

Thanks !
Comment 9 yann 2017-03-28 16:34:33 UTC
(In reply to Cedric M from comment #8)
> Yes, no blanking anymore ! :-)
> Didn't try any newer kernel since though.
> I guess that it's going to be merged in stock 4.12 ?
> 
> 
> Still get occasional lockups (mouse ultra slow to move/huge lag, everything
> else frozen), but I guess that it's not related to this bug.
> 
> Thanks !

Thanks for your feedback. Then closing as fixed


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