[Bug 108134] [CI][SHARDS] igt at kms_flip_tiling@flip-to-x-tiled - fail - Failed assertion: !mismatch

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108134

--- Comment #9 from Martin Peres <martin.peres at free.fr> ---
(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).

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