I installed mtp-tools on 14.04 "Trusty" through Software Center. No problems with install. Issuing `mtp-detect' results in

'Unable to open ~/.mtpz-data for reading, MTPZ disabled.libmtp version: 1.1.6

Listing raw device(s) No raw devices found.'

I did some research and found that mtpfs might be required. so installed that with

:~$ sudo apt-get install mtpfs

I still get the following result

:~$ mtp-detect Unable to open ~/.mtpz-data for reading, MTPZ disabled.libmtp version: 1.1.6

Listing raw device(s) No raw devices found.

My research indicates that the mtp-tools package is still under development.

source: http://libmtp.sourceforge.net/

and the documentation is not comprehensive.

source man mtp-tools as well as mtp-detect -h

I tried adding the PPA from Are there any plans to improve mtp support on future Ubuntu releases? but it seems this is already worked into trusty 14.04 and won't resolve the problem.

Can anyone provide a recommended course of action to resolve this problem?