My Galaxy A5 (2017) is not mounting automatically although it appears to be recognized properly (see dmesg) and it is set for MTP transfer:
[ 1799.793224] usb 3-1: USB disconnect, device number 3
[ 1813.883366] usb 3-1: new high-speed USB device number 4 using xhci_hcd
[ 1814.011999] usb 3-1: New USB device found, idVendor=04e8, idProduct=6860
[ 1814.012004] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1814.012007] usb 3-1: Product: SAMSUNG_Android
[ 1814.012009] usb 3-1: Manufacturer: SAMSUNG
[ 1814.012011] usb 3-1: SerialNumber: 5210e432c0641479
[ 1814.013521] cdc_acm 3-1:1.1: ttyACM0: USB ACM deviceFurthermore lsusb clearly lists my phone:
Bus 003 Device 005: ID 04e8:6860 Samsung Electronics Co., Ltd Galaxy (MTP)In addition, my phone keeps flashing an error message:
Attention
The connected device is unable to access data on this device.
Reconnect the USB cable and try again. I am using a Type-C cable on Ubuntu 16.04.3 LTS running on an ASUS laptop.
I saw the question and answer at (re) mount usb device, yet it doesn't work for me since mount | grep ^/dev shows nothing related to my phone. That being said, I do see /dev/ttyACM0, yet mount failed with the error message:
mount: /dev/ttyACM0 is not a block device--EDIT 1--
I didn't get any better results in PTP mode - i.e. the phone was not automatically mounted:
[ 3517.875378] usb 3-1: USB disconnect, device number 11
[ 3517.876961] cdc_acm 3-1:1.1: failed to set dtr/rts
[ 3518.183436] usb 3-1: new high-speed USB device number 12 using xhci_hcd
[ 3518.312069] usb 3-1: New USB device found, idVendor=04e8, idProduct=6866
[ 3518.312077] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3518.312082] usb 3-1: Product: SAMSUNG_Android
[ 3518.312085] usb 3-1: Manufacturer: SAMSUNG
[ 3518.312088] usb 3-1: SerialNumber: 5210e432c0641479--EDIT2--
Running gmtp shows the following:
Device 0 (VID=04e8 and PID=6860) is a Samsung Galaxy models (MTP).
LIBMTP ERROR: couldnt parse extension
Error 1: Get Storage information failed.
Detect: No available Storage found on device?--EDIT3--
The same cable, connected to the same USB port, on the same (dual boot) computer, mounts the device just fine in Win10
7 Reset to default
