https://bugs.freedesktop.org/show_bug.cgi?id=89980
--- Comment #7 from falaca@gmail.com --- Created attachment 115102 --> https://bugs.freedesktop.org/attachment.cgi?id=115102&action=edit Different "checkerboard" corruption
This might be totally unrelated, but since I don't know enough to make that judgement, I thought I should share just in case (otherwise I could make a separate bug report for it).
Basically, I get intermittent checkerboard patterns which appear on my screen, as seen in the 2 screenshots I'm attaching (some areas blacked out by me for privacy). I don't know how to reproduce the patterns - they appear intermittent and seem unrelated to suspend/resume. They either look like "noise", like in the first screenshot, or they are remnants from a previous window that was open, like in the second screenshot.
Both of those screenshots are from the portrait display (unlike the behaviour from the video I posted in the original bug report, which only happens on the landscape display). I can't remember if I've seen this happen on the landscape display so far. I can keep collecting screenshots to see if it's confined to specific areas of the screen.
For what it's worth, I have used Catalyst 14.12 for a couple of months with this card, and didn't observe this type of behaviour.