... after the next release. This disables the new default Radeon xorg.conf too and avoids building LE yourself.
Great thanks, will give it a try 
A radeon glamor driver has a "TearFree" option that is for some reason defaulted to "off". Creating in /storage/.config the file xorg.conf as follows solves the issue.
Code:
Section "Device"
Identifier "AMD Graphics"
Driver "radeon"
Option "DRI3" "1"
Option "TearFree" "on"
EndsectionP.S. It would be nice if the maintainers add this option in the build...
P.P.S. The same seems to be applicable to amdgpu driver, too.