https://bugs.freedesktop.org/show_bug.cgi?id=50857
--- Comment #10 from Zoltán Böszörményi zboszor@pr.hu 2012-06-08 07:02:49 UTC --- (In reply to comment #9)
Does the problem also occur if you don't specify Option "ColorTiling2D" at all in xorg.conf? It's disabled by default.
I thought it was on so this is what I created yesterday:
# cat /etc/X11/xorg.conf.d/01-radeon.conf Section "Device" Identifier "Radeon" Driver "radeon" Option "ColorTiling2D" "off" EndSection
and Xorg.0.log had this line:
[ 23.358] (**) RADEON(0): Option "ColorTiling2D" "off"
So yes, it happens even with explicitly disabling it and without the above file too.