Something new: When the problem happens, I can also press Fn+F5 (which is the key combo to disable the touchpad on this laptop) twice to disable/enable the touchpad to make the problem go away, same effect as with Ctrl-Alt-F1/Ctrl-Alt-F7 or same effect as a modprobe -r psmouse and adding the psmouse driver again.
Something new: When the problem happens, I can also press Fn+F5 (which is the key combo to disable the touchpad on this laptop) twice to disable/enable the touchpad to make the problem go away, same effect as with Ctrl-Alt- F1/Ctrl- Alt-F7 or same effect as a modprobe -r psmouse and adding the psmouse driver again.
This is however a faster key combo ;)