[13.1] cannot disable mouse emulation on keypad

I installed 13.1/Xfce in place of 11.2/Xfce. I kept my home as is (with all config files).
The keypad seems locked into the “mouse emulation” mode. I used to hit Control-Shift-Numlock to switch between mouse emulation and normal operation; now this is not working anymore.
Any hints?

Problem solved.

I desinstalled ibus, and I unchecked mouse emulation in Xfce settings manager.

I don’t know which step solved the problem, or if both were required.

(Looks like I cannot edit the thread title to mark it solved.)