KDE 5: Keyboard and mouse settings not applied after re-plugging device or after suspend/resume cycle

[Gunter Ohrner]

Installation: Kubuntu 15.04 x64
USB-Keyboard and mouse

Probably a (K)Ubuntu-specific problem:

Custom keyboard and mouse settings configured in KDE's systemsettings5 are not re-applied after unplugging / replugging the input device or after a suspend / resume cycle.

See also upstream bugs for reference, where most/all users experiencing the problem appear to be Kubuntu-15.04-users:

https://bugs.kde.org/show_bug.cgi?id=346336
https://bugs.kde.org/show_bug.cgi?id=350240

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[TWidXugA (twidxuga)]

Confirming Gunter's observations, I found that a (not so convenient) "workaround" for me is to run the following command after resume from suspend, or when connecting a new keyboard, to force configuration reload:

dbus-send --session /Layouts org.kde.keyboard.reloadConfig

Found this by checking what I got from dbus-monitor when I click the "Apply" button" of the "Keyboard Hardware and Layout" kde menu, after making a change.

Currently trying to find ways to trigger it automatically... I imagine there will be a similar dbus signal to reload mouse config too.

[Gunter Ohrner (gohrner)]

https://bugs.kde.org/show_bug.cgi?id=346336

David Rosca changed:

           What |Removed |Added
----------------------------------------------------------------------------
     Ever confirmed|0 |1
             Status|UNCONFIRMED |CONFIRMED

--- Comment #13 from David Rosca ---
The issue here is that the code that listens to device added events is using
xcb-xinput which is disabled by default when building libxcb and so is not
available on some distros (eg. Debian:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=733227).

For 5.4.2, I have pushed a fix
https://quickgit.kde.org/?p=plasma-desktop.git&a=commitdiff&h=415c962dea42fba31f9486f55e90630e60bb2bc2
that should help with the issue for systems without xcb-xinput.

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[sanette (sanette-linux)]

this bug is striking back, here on Mint KDE 18 (based on ubuntu 16.04).

I set mouse speed in the KDE settings, apply => OK
I unplug/plug again the mouse => settings are back to default, the new ones are not applied.