(In reply to comment #50)
> (In reply to comment #49)
> > (In reply to comment #47)
> > > (In reply to comment #40)
> > > > I am also seeing the corruption on Mesa 10.0.1.
> > > 
> > > Same here: lots of flickering textures. rv730 (HD4xxx).
> > > 
> > > Present with the tip of the master branch. Not influenced by 7948ed1250.
> > > So far I haven't been able to find a revision that does *not* show the
> > > flickering. I went as far back as December 2012.
> > 
> > Please set this environment variable:
> > 
> > R600_DEBUG=nodma,nocpdma
> > 
> > and tell us if it fixes anything.
> 
> These two options do not help. Do you want me to file a new bug?

Please try also:

R600_DEBUG=noinvalrange

There will be a severe performance hit though.