[gurabli]

Nothing to do with kodi. If the mode is not available it won't switch to it, but fallback to the systemdefault.

Edit: As you use my howto, just add: DISPLAY=:0 xrandr -r 50 before the command to start kodi

Thanks fritsch
exactly where to put the above line? How should it look properly? I'm using the howto from first post, line by line.