[CI][SHARDS] igt@kms_flip_tiling@flip-to-{x,y,yf}-tiled - fail - Failed assertion: !mismatch

Submitted by Martin Peres @mupuf

Assigned to Mika Kahola

Link to original bug (#108134)

Description

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_119/fi-bdw-samus/igt@kms_flip_tiling@flip-to-x-tiled.html

Starting subtest: flip-to-X-tiled
(kms_flip_tiling:1134) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:392:
(kms_flip_tiling:1134) igt_debugfs-CRITICAL: Failed assertion: !mismatch

added CI feature: display/Other platform: BDW platform: BYT platform: CFL platform: GLK platform: ICL platform: KBL platform: SKL priority::medium severity::normal + 1 deleted label

Martin Peres @mupuf said:

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_4981/shard-skl3/igt@kms_flip_tiling@flip-to-x-tiled.html

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4677/shard-skl3/igt@kms_flip_tiling@flip-to-x-tiled.html

Starting subtest: flip-to-X-tiled
(kms_flip_tiling:975) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:392:
(kms_flip_tiling:975) igt_debugfs-CRITICAL: Failed assertion: !mismatch
Subtest flip-to-X-tiled failed.

Martin Peres @mupuf said:

KBL results are here
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_133/fi-kbl-soraka/igt@kms_flip_tiling@flip-to-x-tiled.html

Starting subtest: flip-to-X-tiled
(kms_flip_tiling:1192) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:392:
(kms_flip_tiling:1192) igt_debugfs-CRITICAL: Failed assertion: !mismatch
Subtest flip-to-X-tiled failed.

Martin Peres @mupuf said:

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_134/fi-icl-u/igt@kms_flip_tiling@flip-to-x-tiled.html

Starting subtest: flip-to-X-tiled
(kms_flip_tiling:2755) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:419:
(kms_flip_tiling:2755) igt_debugfs-CRITICAL: Failed assertion: !mismatch
Subtest flip-to-X-tiled failed.

Martin Peres @mupuf said:

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_142/fi-byt-clapper/igt@kms_flip_tiling@flip-to-x-tiled.html

Starting subtest: flip-to-X-tiled
(kms_flip_tiling:1323) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:419:
(kms_flip_tiling:1323) igt_debugfs-CRITICAL: Failed assertion: !mismatch
Subtest flip-to-X-tiled failed.

Mika Kahola said:

This seems similar as for example the following bugs with failure crc mismatch

https://bugs.freedesktop.org/show_bug.cgi?id=103166
https://bugs.freedesktop.org/show_bug.cgi?id=103191

Maybe we could mark these as duplicates even though bug #103166 is tagged to CFL?

Mika Kahola said:

Assigning this bug to myself

Daniel Vetter @danvet said:

Note that the history of this tests was because the old command submission page flip could change tiling (but not much else). With atomic this is all done by the atomic pageflip code, so might indicate some larger issue with atomic flips.

Arkadiusz Hiler @ivyl said:

Seems like we have a similar filing for Y and Yf tilings:
https://bugs.freedesktop.org/show_bug.cgi?id=107931

Same, very low, reproduction rate and the issue seems to be as elusive. We should probably combine those.

Martin Peres @mupuf said:

(In reply to Daniel Vetter from comment 7)

Note that the history of this tests was because the old command submission
page flip could change tiling (but not much else). With atomic this is all
done by the atomic pageflip code, so might indicate some larger issue with
atomic flips.

The reproduction rate does not look uniform, which could indicate that the ordering of the test is somewhat important, meaning that one test would leak some state onto the other one.

I suggest using cibuglog's Known Failure view with the following "issue_id=775 AND machine_tag = 'ICL'" query in order to start investigating this issue, looking at which tests were executed in the shard, but bear in mind that shards machines do not always reboot between shards, inside the same run (so also check the tests executed in the previous shard ids). Enjoy!

As for the customer impact, as per Daniel's comment, this might lead to flickering or garbled display, which would make the computer unusable depending on the tiling format of the framebuffer (expected to be stable between driver updates).

Arkadiusz Hiler @ivyl closed a related bug:

*** Bug 107931 has been marked as a duplicate of this bug. ***

CI Bug Log said:

A CI Bug Log filter associated to this bug has been updated:

BYT BDW SKL KBL ICL: igt@kms_flip_tiling@flip-to-x-tiled - fail - Failed assertion: !mismatch
BYT BDW SKL KBL ICL: igt@kms_flip_tiling@flip-to-(x|y|yf)-tiled - fail - Failed assertion: !mismatch

No new failures caught with the new filter

CI Bug Log said:

A CI Bug Log filter associated to this bug has been updated:

BYT BDW SKL KBL ICL: igt@kms_flip_tiling@flip-to-(x|y|yf)-tiled - fail - Failed assertion: !mismatch
BYT BDW SKL KBL WHL ICL: igt@kms_flip_tiling@flip-to-(x|y|yf)-tiled - fail - Failed assertion: !mismatch

No new failures caught with the new filter

CI Bug Log said:

A CI Bug Log filter associated to this bug has been updated:

BYT BDW SKL KBL WHL ICL: igt@kms_flip_tiling@flip-to-(x|y|yf)-tiled - fail - Failed assertion: !mismatch
BYT BDW SKL KBL GLK WHL ICL: igt@kms_flip_tiling@flip-to-(x|y|yf)-tiled - fail - Failed assertion: !mismatch

New failures caught by the filter:

• https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_252/fi-glk-dsi/igt@kms_flip_tiling@flip-to-yf-tiled.html
  

* https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_253/fi-glk-dsi/igt@kms_flip_tiling@flip-to-x-tiled.html

* https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_254/fi-glk-dsi/igt@kms_flip_tiling@flip-to-x-tiled.html

* https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_255/fi-glk-dsi/igt@kms_flip_tiling@flip-to-yf-tiled.html

* https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_255/fi-glk-dsi/igt@kms_flip_tiling@flip-to-x-tiled.html

Mika Kahola said:

The test is failing when trying to flip from tiling none to x, y, or yf tiling.

The worst case scenario for user perspective is corrupted screen when tiling fails to produce correct image.

#assessment

Jani Saarinen @jani.saarinen said:

This issue now seen last time 3 weeks ago. So I guess we could lower priority.

Jani Saarinen @jani.saarinen said:

Not seen now ~2 weeks, BIOS was updated on shards, I guess lowering priority this would be right measure

LAKSHMINARAYANA VUDUM @l4kshmi said:

(In reply to Jani Saarinen from comment 16)

Not seen now ~2 weeks, BIOS was updated on shards, I guess lowering priority
this would be right measure

This occurred one day ago
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6113/shard-iclb8/igt@kms_flip_tiling@flip-to-x-tiled.html

Mika Kahola said:

With the best known BIOS version?

Currently, we have BIOS ICLSFWR1.R00.3175.A00.1904261428 04/26/2019

Jani Saarinen @jani.saarinen said:

latest we have is: R00.3183. That is partly updated on shards too.