[Bug 89980] [Regression] Graphical corruption after resuming from suspend (w/ dual monitor configuration)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89980

--- Comment #7 from falaca at 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.

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