I see, thanks a lot. Also thx for not overwriting the config file.
Will future core-updates be handled via kodi ("download core package in retroarch settings") or will it be possible to update within retroarch itself? Trying to update or download cores right now just gives me visual glitches and forces me to restart.
If you use retroarch online updater to update cores you will get generic linux versions of them that are not optimized for RPi4... there is no repo for such update, thats why I included the core update in the addon settings, there you download the whole core pack from latest Lakka release for each device (RPi2, RPi4 and Generic).