Comment # 10 on bug 72387 from Michel Dänzer

Your options right now are basically:

* Use fullscreen apps, and make sure the compositing manager unredirects
  fullscreen windows.
* Using an OpenGL compositing manager may help to avoid tearing with
  non-fullscreen apps as well.
* Use EXA with Option "EXAVSync" (but read the radeon manpage about its
caveats).