Comment # 5 on bug 98520 from Alex Deucher

(In reply to MirceaKitsune from comment #4)
> (In reply to Alex Deucher from comment #3)
> 
> As openSUSE Tumbleweed updates a lot of packages at once, I cannot say with
> certainty. I believe it might have started happening after I switched from
> Kernel 4.7 to 4.8, but as the issue is very probabilistic as well as risky
> to experiment with it's difficult to tell.

Can you try rolling back to previous packages on a per-component basis to see
which one caused the regression.  Most likely a kernel or mesa change.