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