https://bugzilla.kernel.org/show_bug.cgi?id=60674
--- Comment #13 from Michel Dänzer michel@daenzer.net --- (In reply to Dave from comment #12)
RV350 (Shivah) on AGP bus
[...]
For us, switching the xorg.conf AccelMethod from EXA to glamor caused the mess. No problems occur under EXA.
I doubt an RV350 can handle all of glamor's shaders, so you'll have to stick to EXA for that.
Anyway, not the same problem this bug report is about.