https://bugs.freedesktop.org/show_bug.cgi?id=89374
--- Comment #9 from sunweb@hotmail.ru --- (In reply to Michel Dänzer from comment #8)
With current xf86-video-ati Git master, you can enable DRI3 with Option "DRI3" in xorg.conf. Then "Re-use screen content" should work well. The breakage without that sounds like a kwin issue.
I always experience some troubles using the latest versions so i stay ou of it. But i wouldn't want to use this option because on EXA i have no tearing even with Vsync = none.
About this non smooth scrolling issue. I feel like i am the only one here. If you do not have this problem than what card are you using and is it working as smooth as on Windows?