I have a Dell 17R SE with Ubuntu 13.04. The touchpad is recognized as PS/2 mouse out of the box, giving just normal touchpad behaviour, but no tap to click, no scrolling, etc.

Most answers related to that issue suggest trying an ALPS driver from dahetral.com: http://www.dahetral.com/public-download

For installing I followed the steps on this page: https://www.linuxwind.org/html/dell-touchpad-driver-for-ubuntu-13-04.html

Now my xinput looks like this:

Virtual core pointer id=2 [master pointer (3)]

? ? Virtual core XTEST pointer id=4 [slave pointer (2)]

? ? PS/2 Mouse id=13 [slave pointer (2)]

? ? AlpsPS/2 ALPS GlidePoint id=14 [slave pointer (2)]

? ? Logitech Bluetooth Mouse M555b id=16 [slave pointer (2)]

My touchpad isn't working at all now, just the two hardware buttons for left and right mouse buttons work.

Interestingly also the tap to click functions works, but only in the address bar of nautilus, nowhere (!) else.

What can I do? I would even switch back to initial state, where at least the basic touchpad functionality worked, i I knew, how to get there.