https://bugs.freedesktop.org/show_bug.cgi?id=39897

--- Comment #24 from chrisdhaag@googlemail.com 2011-10-03 09:15:35 PDT --- (In reply to comment #23)

(In reply to comment #22)

...

I completely forgot that I had set the R600_TILING variable to 1. It overrode the xorg settings.

They're not directly related. Does the problem occur with Option "ColorTiling" enabled and R600_TILING=0?

No.

$ grep -i tiling /var/log/Xorg.0.log [ 17.889] (**) RADEON(0): Option "ColorTiling" "on" [ 17.907] (II) RADEON(0): KMS Color Tiling: enabled $ echo $R600_TILING 0

-> Works fine.

So I finally have it:

R600_TILING=1 produces the rendering errors. Is it still worth a new bug report?