Error Activating XKB Configuration causing locking of XFCE Desktop Environment
It can happen under various circumstances: a bug in libxklavier library, a bug in X server (xkbcomp, xmodmap utilities), X server with incompatible libxkbfile implementation.
XServer Version data: The X.org Foundation 12003000
Output of xprop -root | grep XKB
_XKB_RULES_NAMES_BACKUP(STRING) = "evdev", "", "us,jp", ",", "" _XKB_RULES_NAMES(STRING) = "evdev", "", "us", "", ""
Output of gsettings list-keys org.mate.peripherals-keyboard-xkb.kbd
layouts model options
The side effect was locking of the UI of my XFCE Desktop Environment