https://bugs.freedesktop.org/show_bug.cgi?id=71488
--- Comment #9 from Alexander Tsoy alexander@tsoy.me --- (In reply to comment #7)
Here are the regression details
Pass : xf86-video-ati-0c921edf(31st Oct) Fail : xf86-video-ati-e4cd0f43(4th Nov)
e4cd0f43 is a commit which enables tiling on SI by default and it's not a real regression. I didn't tried ColorTiling2D until today, so I'm not sure if it worked in the past (btw, same corruption with xf86-video-ati-7.2.0 and ColorTiling2D enabled).