https://bugs.freedesktop.org/show_bug.cgi?id=89980
falaca@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED
--- Comment #13 from falaca@gmail.com --- Good news! I saw this today: http://lists.x.org/archives/xorg-driver-ati/2015-April/027345.html
So I built and installed Michel's xf86-video-ati repo and enabled TearFree in xorg.conf. The corruption is now gone - so I suppose it was simply some manifestation of tearing, but only after a suspend/resume cycle.
To test it, I installed the module, enabled TearFree, then did a suspend/resume cycle, and I couldn't observe any tearing in the global menus. So then I commented out the TearFree option in xorg.conf and restarted lightdm, and immediately started seeing the really obvious tearing in the menus like in the video I posted. As a final check, I uncommented the TearFree option and restarted lightdm again, and the tearing was gone.
Thanks Michel! And I hope the TearFree feature will eventually be extended to support rotated displays as well!