Bug 100427 - [IVB][BAT] vblank timeout during modeset leading to continual "flip_done timed out" forevermore and BAT timeouts
Summary: [IVB][BAT] vblank timeout during modeset leading to continual "flip_done time...
Status: CLOSED WORKSFORME
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: DRI git
Hardware: Other All
: medium major
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-03-28 05:38 UTC by Jani Saarinen
Modified: 2017-09-28 15:49 UTC (History)
2 users (show)

See Also:
i915 platform: IVB
i915 features:

Attachments

Description Jani Saarinen 2017-03-28 05:38:29 UTC 
On CI DRM run https://intel-gfx-ci.01.org/CI/CI_DRM_2414/fi-ivb-3770/igt.log
Several test throwed dmesg warning. 

See eg:
https://intel-gfx-ci.01.org/CI/CI_DRM_2414/fi-ivb-3770/igt@core_auth@basic-auth.html

https://intel-gfx-ci.01.org/CI/fi-ivb-3770.html

Caused by: 598b6b5 drm/i915: Mark manually wedged engines as guilty
This was fixed on next build but documenting to get errors out from CI system
Comment 1 Jani Saarinen 2017-03-28 05:40:17 UTC 
Was fixed by:
5f3b6ab drm/i915: Click the ACTHD three times to go home

Is this correct?
Comment 2 Chris Wilson 2017-03-28 08:19:22 UTC 
No. It wasn't caused by the patch, or fixed by any change to the kernel. During boot a vblank wait failed and the kernel was left in a bad state. We are not exercising this path in CI and so we do not know the full extent of the damage.
Comment 3 Jani Saarinen 2017-03-28 12:35:15 UTC 
To improve here, are we missing some IGT test here to add coverage?
Comment 4 Chris Wilson 2017-03-28 12:58:50 UTC 
Yes, clearly that vblank miss went bad, in order to replicate, we should consider fault injection in the middle of a modeset.
Comment 5 Elizabeth 2017-06-23 20:46:42 UTC 
Good afternoon, 
Is there any update in this case?? Thank you.
Comment 6 Elizabeth 2017-06-30 20:33:19 UTC 
Hello,
Seems that this problem is going to take sometime, so I'm changing status to NEEDINFO. If there is any update on this case, please share and mark as REOPEN. Thanks.
Comment 7 Elizabeth 2017-09-28 15:42:22 UTC 
According to https://intel-gfx-ci.01.org/CI/fi-ivb-3770.html
There is no more warning messages from 2017-09-11 to 2017-09-28.
Comment 8 Jani Saarinen 2017-09-28 15:48:58 UTC 
Agree. Lets close this now.

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