Hi everybody,

Problem: my cursor jumps and clicks everywhere and it has become more severe - it is maddening
This question I have seen before and tried the suggestions, but I still have this problem.
What I tried:
1. I found a possible solution: lowering KDE Plasma's sensitivity, but this dialogue window was greyed.
2. Then I found the reason and solution for this greying: it was libinput. Here are the links I read:
https://www.reddit.com/r/kde/comments/d21mwv/why_are_my_touchpad_sensitivity_settings_greyed/
and
https://forum.kde.org/viewtopic.php?t=130072 - see coryw Thu Mar 21.
But removing libinput makes my keyboard non-functional.

Now: I do not know what I can do.

System: Arch-linux for Surface Pro 4 and KDE up to date.

Best and thank you in advance,

Roberto