Bug 105542 - [CI] igt@drv_suspend@debugfs-reader - dmesg-warn - *ERROR* Panel is unable to calculate any CRC after 6 vblanks TIMEOUT: Sink CRC counter is not zeroed after calculation is stopped
Summary: [CI] igt@drv_suspend@debugfs-reader - dmesg-warn - *ERROR* Panel is unable to...
Status: CLOSED WORKSFORME
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: DRI git
Hardware: Other All
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard: ReadyForDev
Keywords:
Depends on:
Blocks:
 
Reported: 2018-03-16 08:46 UTC by Marta Löfstedt
Modified: 2018-06-19 22:44 UTC (History)
1 user (show)

See Also:
i915 platform: CFL, GLK, SKL
i915 features: display/Other

Attachments

Description Marta Löfstedt 2018-03-16 08:46:50 UTC 
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_1/fi-glk-1/igt@drv_suspend@debugfs-reader.html

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3903/fi-cfl-u/igt@drv_suspend@debugfs-reader.html

results are triggered on:
[  329.545964] [drm:intel_dp_sink_crc [i915]] *ERROR* Panel is unable to calculate any CRC after 6 vblanks

However, I see this suspicious print before in dmesg:
<7>[  328.025191] [drm:intel_dp_sink_crc_stop [i915]] TIMEOUT: Sink CRC counter is not zeroed after calculation is stopped

Also, should the TIMEOUT print be captured by IGT-piglit filtering? i.e. is it in fact an ERROR
Comment 1 Dhinakaran Pandiyan 2018-03-21 00:14:36 UTC 
sink crc isn't critical, should be a low priority bug. We need to silence the noise though. Do we know since when this error started appearing?
Comment 2 Marta Löfstedt 2018-03-21 07:04:02 UTC 
(In reply to Dhinakaran Pandiyan from comment #1)
> sink crc isn't critical, should be a low priority bug. We need to silence
> the noise though. Do we know since when this error started appearing?

Unfortunately this error is on a test that is only on the "full" igt testlist we run on shards and on the drmtip runs on the BAT machines.

Here is a link to a visualization of all the drmtip runs so far:

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip.html

The issue appear to have been reproduced on these runs:
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_1/fi-glk-1/igt@drv_suspend@debugfs-reader.html
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_1/fi-glk-2/igt@drv_suspend@debugfs-reader.html
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_1/fi-glk-4/igt@drv_suspend@debugfs-reader.html

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_1/fi-cfl-u/igt@drv_suspend@debugfs-reader.html
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_2/fi-cfl-u/igt@drv_suspend@debugfs-reader.html
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_4/fi-cfl-u/igt@drv_suspend@debugfs-reader.html
Comment 3 Marta Löfstedt 2018-04-16 06:51:37 UTC 
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_21/fi-skl-6700hq/igt@kms_frontbuffer_tracking@fbcpsr-rgb101010-draw-mmap-cpu.html

[  419.186912] [drm:intel_dp_sink_crc [i915]] *ERROR* Panel is unable to calculate any CRC after 6 vblanks
Comment 4 Marta Löfstedt 2018-04-16 07:10:46 UTC 
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_21/fi-skl-6700hq/igt@kms_frontbuffer_tracking@fbc-rgb101010-draw-blt.html

[  381.555539] [drm:intel_dp_sink_crc [i915]] *ERROR* Panel is unable to calculate any CRC after 6 vblanks
Comment 5 Martin Peres 2018-06-19 22:44:36 UTC 
Used to happen every single run, now not reproduced since drmtip_55 (2 weeks, 5 days / 11 runs ago). Closing!

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