I have now installed the stretch based release.
And everything is lost. I have no network, overscan was also changed, therefore the menu is now out of the screen… Obviously copy/paste /etc/fstab for mounts is not enough, it looks like I need to reconfigure the system again from the beginning. Including both RPi and m2p settings.
If LMS means logitech media server it does not help me at all.
but it looks like there is no other way…