Comment # 31 on bug 57567 from Alexandre Demers

(In reply to comment #30)
> Created attachment 77706 [details] [review] [review]
> additional fix
> 
> Apply this along with attachment 77705 [details] [review] [review].

Using a Cayman 6950 with both patches didn't help over here. Tried two times,
two times where the screen was shifted (like in Vladimir's screenshot). First
time flickering, second only shifted.