I've had similar experiences with graphical corruption in X, and Firefox was almost always involved. Same radeon driver as you. And it seems to be distro-agnostic: I've seen it with Arch, Gentoo and Mint. All I know is that it's a recent thing: if I run an older version of my Gentoo build, it doesn't happen. But otherwise I see the same results.
I have no idea what to point to, because it's really weird. Scrambles /everything/ that goes through video. (And until now, I figured it was a quirk of my bizarre hardware. Guess not.)
Fantastic. I've been trying to pinpoint the cause of it since aeons. It's absolutely dreadful in awesome wm and at some point I laid the blame on (cairo-)XCB, or some Xft bug, but it cropped back too, only less often, under gnome/xfce.
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I've had similar experiences with graphical corruption in X, and Firefox was almost always involved. Same radeon driver as you. And it seems to be distro-agnostic: I've seen it with Arch, Gentoo and Mint. All I know is that it's a recent thing: if I run an older version of my Gentoo build, it doesn't happen. But otherwise I see the same results.
I have no idea what to point to, because it's really weird. Scrambles /everything/ that goes through video. (And until now, I figured it was a quirk of my bizarre hardware. Guess not.)
its a bug with cairo and the radeon driver:
https://bugs.freedesktop.org/show_bug.cgi?id=47266
on debian you can pin libcairo to fix the issue. /etc/apt/preferences:
Fantastic. I've been trying to pinpoint the cause of it since aeons. It's absolutely dreadful in awesome wm and at some point I laid the blame on (cairo-)XCB, or some Xft bug, but it cropped back too, only less often, under gnome/xfce.
That explains it perfectly. My older Gentoo build has an even older version of libcairo installed. Thanks.