[SOLVED] MTP device not getting connected

I am using jmtpfs and libmtp to connect to my android mobile. Following code (run as root) worked well earlier in Debian before recent upgrade to the new version:

#jmtpfs -o allow_other /home/iuser/mtp_device

Earlier there used to be following message but the device used to get connected:

Device 0 (VID=1ebf and PID=707d) is UNKNOWN in libmtp v1.1.13.
Please report this VID/PID and the device model to the libmtp development team

However, in current Debian version, it gives following additional messages and the device is not getting connected:

ignoring libusb_claim_interface() = -6PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
ignoring libusb_claim_interface() = -6LIBMTP PANIC: failed to open session on second attempt
terminate called after throwing an instance of 'MtpErrorCantOpenDevice'
  what():  Can't open device
Aborted

Where is the problem and how can this be solved? Thanks.

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Edit: The device was not getting connected due to screen lock on it being active. It has got connected after disabling the screen lock!

Edit: The device was not getting connected due to screen lock on it being active. It has got connected after disabling the screen lock!

Thanks for posting the solution.

Cheers