[Bug 108950] [CI][SHARDS] igt at kms_rotation_crc@multiplane-rotation-cropping-top - dmesg-fail - Failed assertion: !mismatch, *ERROR* CPU pipe [ABC] FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108950

--- Comment #3 from Martin Peres <martin.peres at free.fr> ---
(In reply to Juha-Pekka Heikkilä from comment #2)
> I did see KBL failing consistently while developing this test. There are
> three multiplane rotation tests, cropping top, no cropping and cropping
> bottom. Interesting thing here is only cropping top fails.
> 
> Those planes are in failing test positioned so primary plane is cropped at
> top left corner and sprite plane is cropped at top right corner so that only
> about 1/4 of planes are visible on screen.
> 
> For testing purpose what really fails there one could first move those
> planes for example so only vertical cropping happen and see if it still
> fails. Just my thoughts.

Thanks for the comment. Feel free to use the trybot to further analyze the
failure :)

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