[Bug 93648] Random lines being rendered when playing Dolphin on radeonsi (w/ apitrace)

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Bug ID 93648
Summary Random lines being rendered when playing Dolphin on radeonsi (w/ apitrace)
Product Mesa
Version git
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity normal
Priority medium
Component Drivers/Gallium/radeonsi
Assignee dri-devel@lists.freedesktop.org
Reporter delroth@gmail.com
QA Contact dri-devel@lists.freedesktop.org

We recently setup Dolphin's automated rendering tests on Fiji XT with
Mesa/amdgpu. It started detected a random rendering issue which I think we can
attribute to a driver bug.

See https://fifoci.dolphin-emu.org/compare/1086020-1085934/ . Left side has the
"bad" rendering, right side the "good" rendering.

The issue is properly captured in this apitrace:
http://delroth.net/radeon-unpredictable.trace -- rendering it on my Fiji XT
system shows the lines but rendering it on i965 doesn't.

We have also had reports of users seeing this in action on Pitcairn GPUs:
https://bugs.dolphin-emu.org/issues/9239


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