Comment # 11 on bug 72387 from Thomas Rohloff

(In reply to Michel Dänzer from comment #10)
> 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).

I'm now on LXQT with compton as compositor. The tearing is still there.