[Bug 90873] GPU hang, TearFree On, Mate desktop environment

https://bugs.freedesktop.org/show_bug.cgi?id=90873

--- Comment #3 from Michel Dänzer michel@daenzer.net --- (In reply to Tom from comment #0)

I experience GPU hang while TearFree option is on.

Does it hang when you do anything in particular?

FWIW, this line in dmesg is probably related:

[ 141.232226] radeon 0000:01:00.0: bo ffff8804236d3400 va 0x0000001000 conflict with (bo ffff88042a018800 0x0000001000 0x0000001563)

but I'm not sure what would cause that.

I've tested TearFree when this feature was introduced in git version of xf86-video-ati-git and I didn't experience GPU hang back then.

Can you try isolating the xf86-video-ati commit introducing the hang with git bisect?