This has been happening for a few days, on KDE Neon, probably after some update.
I use two keyboard layouts, so I have a layout switch icon in the system tray. This is normal.
However now when I log in, there is an extra one, which is apparently from ibus. Also, this message pops up:
IBus should be called from the desktop session in Wayland. For KDE, you can launch ‘systemsettings5’ utility and go to “Input Devices” → “Virtual Keyboard” section and select “IBus Wayland” icon and click “Apply” button to configure IBus in Wayland. For other desktop sessions, you can copy the ‘Exec=’ line in org.freedesktop.IBus.Panel.Wayland.Gtk3.desktop file to a configuration file of the session. Please refer each document about the “Wayland input method” configuration. Before you configure the “Wayland input method”, you should make sure that QT_IM_MODULE and GTK_IM_MODULE environment variables are unset in the desktop session.
If I go to “Virtual Keyboard”, “None” is selected, just like I want it to be. I have to select “Ibus for Wayland” manually, which makes a second ibus icon appear, then switch back to “None” to make both disappear, and this is for every login.
I never enabled ibus, nor do I want it (assuming plasma doesn’t need it in general). How do I prevent this from happening?
(Unsetting QT_IM_MODULE and GTK_IM_MODULE didn’t change anything)