folder and file names have changed, now I had to delete multiple files just to watch a new one
beeing created, apprntly there is a file for each resolution. But the resolution entry I desired was not there. In the new file I changed the resolution, 60 was already correct, rebooted and had the desired look.
The monitor connected is actually a UHD - TV. Television cable is not connected and Android functionality is not initialized, because I do not wantbto know what media wants me to hear or see, and dont want to have an other Android device spying on me 