https://bugs.freedesktop.org/show_bug.cgi?id=69062
--- Comment #4 from LRN lrn1986@gmail.com --- (In reply to comment #3)
Is this a regression?
If by "regression" you mean "it worked before, but doesn't work now" - yes.
Does disabling tiling help?
Add:
Option "ColorTiling" "False" Option "ColorTiling2D" "False"
in the device section of your xorg.conf
I've added this:
Section "Device" Identifier "Device0" Driver "radeon" Option "ColorTiling" "False" Option "ColorTiling2D" "False" EndSection
to my /etc/X11/xorg.conf.d/00-git-xorg.conf. After rebooting and looking at Xorg log, i can see that it groks these options, and later says that KMS Color Tiling and Color Tiling 2D are disabled.
However, this does not offer any visible improvements.