Comment # 54 on bug 93826 from Pavel Bordukov

(In reply to Jonas from comment #53)
> Try the patches provided at the end of this thread:
> https://bugs.freedesktop.org/show_bug.cgi?id=96868
> 
> For me it fixed the issue completely.

Doesn't work for me. Linux 4.11.3, R9 290x, Asus MG279Q, 144Hz has flickering
and dirty picture. 120Hz works well.