Hi Andreas, >Unable to open ~/.mtpz-data for reading, MTPZ disabled.
This text does not contain any important information and does not affect at work of libmtp. Actually, I think that git version does not consist this error message at any initialization of libmtp.
But this >Device 0 (VID=0bb4 and PID=2008) is UNKNOWN.is really important. Can you say, what device it is? I will create the bug in the upstream if libmtp does not support it yet.
-- Regards, R.H.