Ubuntu
xserver-xorg-input-synaptics package

  1. Bug #418282
  2. Comment #21

Comment 21 for bug 418282

Revision history for this message
worufu (p-launchpad-net-gfrast-com) wrote : Re: Touchpad not recognized on Asus U80 series. Touchpad Panel missing from mouse settings

Problem also valid for ASUS N61Vn.
Exactly as described in the other posts.
The <Fn>F9 fix works great.