https://bugs.freedesktop.org/show_bug.cgi?id=82473
--- Comment #23 from dimangi42@gmail.com --- (In reply to comment #21)
Does disabling tiling help? Add: Option "ColorTiling" "false" Option "ColorTiling2D" "false" To the device section of your xorg config.
Does not help. I get back to the orig. striped screen. Even after removing the new options from xorg.conf.