Comment 89 for bug 278318

Video playback using textured video suffers from tearing. This problem mostly concerns G45 users, as it doesn't have hardware overlay.

It was discussed on the xorg mailing list where Keith Packard outlined a few possible solutions:
 http://lists.freedesktop.org/archives/xorg/2009-January/042530.html

and Michel Dänzer described how the radeon driver handles the same problem:
 http://lists.freedesktop.org/archives/xorg/2009-January/042541.html

(It's a well known problem, I only created this bug report so it's easy to track progress for users.)