LIBMTP PANIC: failed to open session on second attempt

[francesco1119]

This is what happens:

root@bobby:/media# mtpfs /media/SAMSUNG_Galaxy3/
Unable to open ~/.mtpz-data for reading, MTPZ disabled.
Listing raw device(s)
Device 0 (VID=04e8 and PID=6860) is a Samsung Galaxy models (MTP).
   Found 1 device(s):
   Samsung: Galaxy models (MTP) (04e8:6860) @ bus 1, dev 6
Attempting to connect device
ignoring libusb_claim_interface() = -6PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
LIBMTP PANIC: failed to open session on second attempt
Unable to open raw device 0