https://bugs.freedesktop.org/show_bug.cgi?id=69341

--- Comment #15 from darkbasic darkbasic@linuxsystems.it --- Another user with the same distro (Gentoo) and HD7700 (radeonsi) told me he doesn't have this problem:

http://phoronix.com/forums/showthread.php?85135-GLAMOR-ized-Radeon-Driver-Sh...

http://phoronix.com/forums/showthread.php?85135-GLAMOR-ized-Radeon-Driver-Sh...

oibaf pointed me to some glamor patches: http://lists.freedesktop.org/archives/glamor/2013-October/date.html

I can't try them right now (I'm in Spain) but I will in a week or two.