https://bugs.freedesktop.org/show_bug.cgi?id=74927
--- Comment #6 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #5)
Hello,
The kernel I was using was Linux ubuntu 3.13.0-8-generic #27-Ubuntu
That patch you mention made it to #28, I have since tested with the updated kernel and the xorg.conf options you mention, neither have resulted in a fix.
Sorry, logic inversion. try this:
Section "Device" Identifier "Radeon" Driver "radeon" Option "ColorTiling" "false" Option "ColorTiling2D" "false" EndSection