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Old 07-15-2017, 11:46 PM   #1
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The process for the mtp protocol died unexpectedly

I have Slackware 14.2, kernel 4.4.75 and KDE. I tried to copy a file from my USB connected Samsung Android to my desktop with dolphin and got the error "The process for the mtp protocol died unexpectedly". I seen lots of posts on this including some in LQ, but none see to answer for me.

One person suggested Andriod File Transfer: Others have suggested things like go-mtpfs, simple-mtpfs and jmtpfs, but they don't really tell me what these things are, how to install them or how to use them. I find the following at SlackBuilds:


the last listed also mentioned by a Internet poster.

On person suggested adding the user to the plugdev group. When I did that I got a different error:
Unknown error code 150
Unspecified error
Please send a full bug report at
Has anyone got this working? Seems like a pretty basic need for a personal computer.
Old 07-16-2017, 12:29 AM   #2
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I am one person on another forum who recommends you try android-file-transer
I use it but got it from a slightly diff link and provides more info on how to install it...altho not strictly slack wise

once compiled you have a gui desktop entry and a GUI starts and you then use it to transfer files

On KDE I got a crappy notifier to try and open my android with Dolphin a file manager....but it was not working

I ignore the notifications from dolphin, connect android and click on the desktop entry for android-file-transfer

2) it is always a good idea for the local user to be a member of plugdev try this

if you can't see plugdev as an entry....try this as root please

3) if you are having trouble compiling a-f-transfer I or others can go thru the list of tools required
but as you try to compile....if you are missing error will show and then you can search that error on the net

4) you mention other apps and this link shows how they may also be used

but the main prob is with libmtp and that is why I use phone version is android 7

libmtp does not handle newer Android devices well

Last edited by aus9; 07-16-2017 at 12:36 AM.
Old 07-16-2017, 12:38 AM   #3
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Have you set up udev rules for your devices? Most of the time this type of problems happen because the user doesn't have the correct permissions to access the device.

Add the user to the plugdev group, and set up rules for each device you want to connect. Make sure MTP is enabled on the device (USB for file transfer, or something to that effect). As an example, these are the rules I use for my devices:

# MSI tablet
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", MODE="0664", OWNER="root", GROUP="plugdev"
# Sony
SUBSYSTEM=="usb", ATTR{idVendor}=="0fce", MODE="0664", OWNER="root", GROUP="plugdev"
# Samsung
SUBSYSTEM=="usb", ATTR{idVendor}=="04e8", MODE="0664", OWNER="root", GROUP="plugdev"
# Huawei
SUBSYSTEM=="usb", ATTR{idVendor}=="12d1", MODE="0664", OWNER="root", GROUP="plugdev"
SUBSYSTEM=="usb", ATTR{idVendor}=="0bb4", MODE="0664", OWNER="root", GROUP="plugdev"
SUBSYSTEM=="usb", ATTR{idVendor}=="1004", MODE="0664", OWNER="root", GROUP="plugdev"
With only this setup I'm able to use dolphin, thunar, pcmanfm and jmtpfs to browse the files on my phone. YMMV.
Old 07-16-2017, 12:46 AM   #4
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If you can enable samba on your linux-rig and export some or the whole of your data, then the AndSMB-app is very good, I use it all the time for file transfers back and forth
Old 07-17-2017, 12:11 AM   #5
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I'm not sure it's related but yesterday my android phone just went to "only load the battery" instead of sticking to "filetransfer". After putting my screen on "never sleep" it went wel I could copy 3GB and the problem has gone away.

Forgot to add the transfer stopped when the screen went off.

Last edited by MikelN; 07-17-2017 at 12:21 AM.
Old 07-17-2017, 07:41 AM   #6
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You could try a newer libmtp. Slackware-current has 1.1.13, which is the latest version (14.2 includes 1.1.11).

To use it, download the source directory for libmtp from a -current mirror and then run the SlackBuild and use upgradepkg on the resulting package.


died, dolphin, mtp, protocol

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