No one tried this yet? Would be interesting to know if the tweak works on other amlogic boxes or on 4K TV's also whether there's something else causing it to be blurred in lebreelec at the default zoom.
I'm using libreelec version 7.0.3.010
It's a big increase in image quality (see below)
4K video was downloaded from youtube using 4K video downloader.
A better question would be if there is a script you could run automagically to trigger this. Unfortunately I don't have that answer..