Jtdylktuy

I could connect to my Android Alcatel Pixi 4 (5) via MTP on Ubuntu 16.04 (there was a bug where the protocol "died unexpectedly" if a file delete was followed by a file copy, but other than that, it worked).

After upgrading to Ubuntu 18.04 I get "protocol died unexpectedly" in Dolphin whenever I try to browse the device.

#> mtp-detect

libmtp version: 1.1.13



Listing raw device(s)

Device 0 (VID=1bbb and PID=0167) is a Alcatel/TCT 6010D/TCL S950.

   Found 1 device(s):

   Alcatel/TCT: 6010D/TCL S950 (1bbb:0167) @ bus 3, dev 2

Attempting to connect device(s)

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

Unable to open raw device 0

OK.

dmesg contains:

[  471.588800] usb 3-4: usbfs: process 9290 (gmtp) did not claim interface 0 before use

[  471.715547] usb 3-4: reset high-speed USB device number 3 using xhci_hcd

[  471.864513] usb 3-4: usbfs: process 9290 (gmtp) did not claim interface 0 before use

[  471.864735] usb 3-4: usbfs: process 2562 (events) did not claim interface 0 before use

I tried building libmtp-1.1.15 from source, problem persists. The device works via MTP access on Windows on the same machine.

I had similar issue with my openSUSE. After I have installed jmtpfs, kio-mtp mtp-tools the issue disappeared and everything started to work correctly.

If you have already used jmtpfs or a similar tool with a mount point of ~/android_mount/, then first make sure it's not mounted:

# unmount previously mounted device

fusermount -u ~/android_mount/



# this should show empty directory

ls -la ~/android_mount/

You can also use the output of df to see if perhaps it's mounted elsewhere.

Otherwise, create a new mount point, let's say ~/android_mount/ and mount your Android phone, after you connected it with USB cable and switched it to 'File Transfer' mode (it normally defaults to 'Charge'):

# make directory to mount

mkdir -p ~/android_mount/



# mount the device (can take several minutes)

# it will also show device information while mounting

jmtpfs ~/android_mount/



# now you should see internal storage if you don't have an SD card

ls -la ~/android_mount/

drwxrwxr-x 12 login login    0 Jan  3  44248648 Internal storage

# if it has an SD card too, then it'll show 2 entries



# look inside

ls -la ~/android_mount/Internal storage/

Now you can operate on the files as you'd on any USB attached device.

# when finished, unmount the device

fusermount -u ~/android_mount/

Could you add jmtpfs -l to your question?

If MTP does not work, you may try instead KDE Connect.

See these references :

• How to Install KDE Connect in Ubuntu 16.04 LTS


• KDE Connect on Google Play

make directory to mount

mkdir -p ~/android_mount/

mount the device (can take several minutes)
it will also show device information while mounting

jmtpfs ~/android_mount/

now you should see internal storage if you don't have an SD card

ls -la ~/android_mount/



drwxrwxr-x 12 login login    0 Jan  3  44248648 Internal storage

if it has an SD card too, then it'll show 2 entries

look inside

ls -la ~/android_mount/Internal storage/

My mobile starts working now ...

Look at the gvfs, mtp* packages, in Synaptic, and under package->force package version you should have it set to (codename)-updates. If it fails remove package and reinstall all packages you remove. The packages probably didn't get upgraded to the appropriate version.

Reboot and you should see Android devices open.