I still have the problem: on Linux Mint 17 (based on Ubuntu 14.04), libmtp version 1.1.6-20-g1b9f164-1ubuntu2, device Samsung Galaxy S4 I9505.
I still have the problem: on Linux Mint 17 (based on Ubuntu 14.04), libmtp version 1.1.6-20- g1b9f164- 1ubuntu2, device Samsung Galaxy S4 I9505.