How do I make my touchpad working without having to press Window(super)Key? I am using Ubuntu 16.04.3, I don't use mouse. It is working normal before (Without have to press Win Key) when I first installed Ubuntu. But then suddenly about 2 weeks, it was not working that way anymore(just simple tap, double tap or two finger scroll is not working), and I found out that I have to hold on on win key to make my touchpad works.
my touchpad is
↳ ETPS/2 Elantech Touchpad id=13 [slave pointer (2)]
after I run: xinput list-props 13: xinput list-proos 13