Comment 27 for bug 954109

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Seth Forshee (sforshee) wrote : Re: ALPS Touchpad is missing tapping right mouse clicks

I'm surprised you got the right clicks previously. Try the following.

  sudo modprobe -r psmouse
  sudo modprobe psmouse proto=bare

If that doesn't get them, try again with proto=imps.

If one of these gets the right clicks back, you can make it permanent by creating a file named /etc/modprobe.d/psmouse.conf with the following contents (just change bare to imps if that's the one that worked).

  options psmouse proto=bare