Bug 513341

Summary:	Keyboard layout (Japanese) is not persisted after reboot/logout in Plasma Wayland session, constantly resetting to English (US). (Affects KCM/Keyboard)
Product:	[Plasma] plasmashell	Reporter:	kinri <m.okada0811>
Component:	Keyboard Layout widget	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	NEEDSINFO WAITINGFORINFO
Severity:	normal	CC:	butirsky, cwo.kde, duha.bugs, nicolas.fella
Priority:	NOR
Version First Reported In:	6.5.4
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description kinri 2025-12-14 05:08:26 UTC

SUMMARY
Keyboard layout (Japanese) is not persisted after reboot/logout in Plasma Wayland session, constantly resetting to English (US). (Affects KCM/Keyboard)

STEPS TO REPRODUCE
1. Set the system-wide keyboard layout to Japanese (`XKBLAYOUT="jp"`) in `/etc/default/keyboard`.
2. In KDE System Settings > Keyboard > Layouts, ensure "Japanese (OADG 109A)" is selected/active.
3. Log out or reboot the system.
4. Log back into the Plasma (Wayland) session.
5. Check the keyboard layout in KDE System Settings.

OBSERVED RESULT
The system consistently reverts the keyboard layout back to "English (US)".
The user-specific configuration file (`~/.config/kcminputrc`) is found to be empty after the reset, even after manually writing the configuration.
(This indicates the system fails to persist the KCM/Keyboard settings.)

EXPECTED RESULT
The keyboard layout "Japanese (OADG 109A)" should be persisted and active after logging back into the session, respecting both `/etc/default/keyboard` and user settings.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 25.10 (Development/Pre-release)

KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION
* Graphics Platform: Wayland
* Graphics Processor 1: NVIDIA GeForce RTX 2060

Comment 1 cwo 2025-12-15 02:13:40 UTC

Do you have fcitx5 installed?

If so, it will take over your keyboard layout configuration and overwrite what you set in kcm_keyboard, unless you configure it not to do that. fcitx5 does that so that input method switching can also switch keyboard layout to something appropriate for that input method.  

If you want fcitx5 to handle this, configure the keyboard layout in the fcitx5 settings. The easiest way of doing so is installing the kcm for fcitx5, which should be available in most distributions..

Similarly, if you want kcm_keyboard to handle it, set the option in fcitx5 to not overwrite the system keyboard configuration in the same way.