Bug 93401

Make it possible to disable the movement of the Touchpad while keeping buttons working. This feature is especially important for people who want to use the Trackpoint of their Thinkpad X240, T440, W540 etc. These devices lack physical Trackpoint buttons, thus require an enabled Touchpad. Disabling only the movement would avoid unwanted cursor movement when clicking or accidentally touching the Touchpad.

With the synaptics driver a simple synclient touchpadoff=1 used to be enough.

I’ve done a quick&dirty “fix” in libinput for myself by uncommenting line 920 in evdev-mt-touchpad.c:

		tp_thumb_detect(tp, t, time);
		tp_palm_detect(tp, t, time);

		//tp_motion_hysteresis(tp, t);
		//tp_motion_history_push(t);

		tp_unpin_finger(tp, t);

Unfortunately I lack knowledge to implement this as an exposed option.