The problem started for me also after some upgrade. Somehow the IM env. variables are set to ibus on my system:
GTK_IM_MODULE=ibus QT4_IM_MODULE=ibus QT_IM_MODULE=ibus XMODIFIERS=@im=ibus
Since KDE/Plasma has its own keyboard icon in the system tray, I advise to run ibus-daemon without icon:
ibus-daemon -d -s
The problem started for me also after some upgrade. Somehow the IM env. variables are set to ibus on my system:
GTK_IM_MODULE=ibus
QT4_IM_MODULE=ibus
QT_IM_MODULE=ibus
XMODIFIERS=@im=ibus
Since KDE/Plasma has its own keyboard icon in the system tray, I advise to run ibus-daemon without icon:
ibus-daemon -d -s