[Solved] KDE: mtp device used by another process (/usr/lib/kf5/kiod5)

Xwang · 2020-12-21 12:48:51

Hi to all,
up until the beginning of this month I ran the following script to back up my Motorola G5 to my PC using simple-mtpfs and backintime.

#!/bin/bash

simple-mtpfs --device 1 $HOME/mnt/

date > /home/andreak/mnt/samsung64gb/.latestMountTime.txt

sudo -u $USER backintime --profile BackupMotoG5 backup

sudo -u $USER backintime --profile BackupMotoG5 smart-remove

fusermount -u $HOME/mnt/

Having bought a new smartphone I tried to follow the same approach, but the new smartphone seems to interact differently with the PC.
When I try to mount it with simple-ntpfs or with aft-mtp-mount, it is already used by another processs:

$ simple-mtpfs --device 1 $HOME/mnt/
LIBMTP PANIC: Trying to dump the error stack of a NULL device!
$ aft-mtp-mount -o allow_other ~/mnt
Device::Find failed:Device is already used by another process connect failed: no MTP device found

So I've discovered that it is used by the "/usr/lib/kf5/kiod5" process called by the "/user/lib/systemd/systemd --user" process:

$ lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 001 Device 011: ID 2717:ff48 Xiaomi Inc. Mi/Redmi series (MTP + ADB)
Bus 001 Device 003: ID 04f2:b3fd Chicony Electronics Co., Ltd HD WebCam (Asus N-series)
Bus 001 Device 006: ID 04fc:05d8 Sunplus Technology Co., Ltd Wireless keyboard/mouse
Bus 001 Device 004: ID 1bcf:08a0 Sunplus Innovation Technology Inc. Gaming mouse [Philips SPK9304]
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ sudo fuser /dev/bus/usb/001/011 
[sudo] password di *******: 
/dev/bus/usb/001/011:  6015
$  ps -fp 6015
UID          PID    PPID  C STIME TTY          TIME CMD
*******    6015     807  0 12:35 ?        00:00:00 /usr/lib/kf5/kiod5

If I kill the process "/usr/lib/kf5/kiod5" I can mount the device using:

simple-mtpfs --device 1 $HOME/mnt/

So in order to be able to backup my new device I have to:
1) kill the "/usr/lib/kf5/kiod5". Is it safe to do that?
2) find a way to identify the USB Bus # and Device # so that to find the process number and kill it (these numbers change every time I connect the smartphone). How can I do that? Is there any other way to do that?

Last edited by Xwang (2020-12-21 22:37:49)

Xwang · 2020-12-21 12:56:11

This bug https://bugs.kde.org/show_bug.cgi?id=412257 seems related and I wonder why my old smartphone do not suffer in the same way?
Maybe it is not recognized by UDEV and so kiod5 is not called. Is there a way to verify if this is the case and if so to force UDEV to not call kiod5 for the new smartphone too?

Xwang · 2020-12-21 22:33:48

I've found how to do:

#!/bin/bash

#Getting Xiaomi Redmi Note 9 Pro data from lsusb using its ID 2717:ff48
DATA=`lsusb | grep '2717:ff48'`
echo $DATA
# Reading the bus number:
BUS=`echo ${DATA:4:3}`
# Reading the device number:
DEV=`echo ${DATA:15:3}`
# Killing the process which is using the device (if any)
fuser -k /dev/bus/usb/$BUS/$DEV

simple-mtpfs --device 1 /home/andreak/mnt/

date > /home/andreak/mnt/disk/.latestMountTime.txt

sudo -u andreak backintime --profile BackupRedmiNote9Pro backup

sudo -u andreak backintime --profile BackupRedmiNote9Pro smart-remove

fusermount -u /home/andreak/mnt/

But the rsync doesn't work with this new device.

Arch Linux

#1 2020-12-21 12:48:51

[Solved] KDE: mtp device used by another process (/usr/lib/kf5/kiod5)

#2 2020-12-21 12:56:11

Re: [Solved] KDE: mtp device used by another process (/usr/lib/kf5/kiod5)

#3 2020-12-21 22:33:48

Re: [Solved] KDE: mtp device used by another process (/usr/lib/kf5/kiod5)

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