thx Frank (would be much easier in german, but ok ....)
currently I don´t have my rune/pi device to look at, so just from memory;
In "Settings" , there´s an option where you can choose different kernels (rune-something as default + 2-3 others)
during scrolling on my mobile device I hit the "save settings" button - now this arch-linux kernel is active and the others disappeared from the pop-up
The error-message linked above:
no I did no update (except yours for the , which all the trouble started - but that´s many installations ago
)
I suspect it may be the cheap card-reader (mSD->USB), because everything is ok before I copy the playlists to var/lib/mpd .
I´ll check that at my next installation marathon.
BTW the is recognized again, also.
Probably it´s crucial that everything is connected and running at the 1st (!) boot (no way if only correct on the 2nd, 3rd....?)
And (last not least) you have to let rune finishing updating the library before doing anything (just my guess)
setup is RB.Pi2 / rune04 / FiioE17 (dac)