Me too, Precise 12.04 fully updated with a galaxy S3:
$ mtp-detect
libmtp version: 1.1.3
Listing raw device(s)
Device 0 (VID=04e8 and PID=6860) is a Samsung GT-P7310/P7510/N7000/I9100/Galaxy Tab 7.7/10.1/S2/Nexus/Note.
Found 1 device(s):
Samsung: GT-P7310/P7510/N7000/I9100/Galaxy Tab 7.7/10.1/S2/Nexus/Note (04e8:6860) @ bus 2, dev 10
Attempting to connect device(s)
PTP_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
OK.
If I manage to run mtp-detect within three secs after plugin, I get the following message (see attached file), but still unity / nautilus will only the top level folders on the internal phone and the sd card, but they are all empty.
Me too, Precise 12.04 fully updated with a galaxy S3:
$ mtp-detect
libmtp version: 1.1.3
Listing raw device(s) P7510/N7000/ I9100/Galaxy Tab 7.7/10. 1/S2/Nexus/ Note. P7510/N7000/ I9100/Galaxy Tab 7.7/10. 1/S2/Nexus/ Note (04e8:6860) @ bus 2, dev 10
Device 0 (VID=04e8 and PID=6860) is a Samsung GT-P7310/
Found 1 device(s):
Samsung: GT-P7310/
Attempting to connect device(s)
PTP_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
OK.
If I manage to run mtp-detect within three secs after plugin, I get the following message (see attached file), but still unity / nautilus will only the top level folders on the internal phone and the sd card, but they are all empty.