Comment # 56 on bug 102646 from tempel.julian@gmail.com

(In reply to bmilreu from comment #55)
> (In reply to Alex Deucher from comment #53)
> > Created attachment 142662 [details] [review] [review] [review]
> > possible fix
> > 
> > How about this patch?
> 
> for me it still flickers after sleep/wake @75hz unless I lock mclck

I can confirm this. For me, it instantly starts flickering after starting x.