https://bugs.freedesktop.org/show_bug.cgi?id=28341
--- Comment #10 from Michel Dänzer michel@daenzer.net 2010-07-14 02:30:55 PDT --- Does reverting xf86-video-ati Git commit 30591320ec46e491ba20904cc64f3405b51c6505 ('kms: add support for the MSC swap & sync API') fix this problem?