Just testing a shiny new Dell Precision M4700, which is great... except the trackpad isn't recognized in Xubuntu 12.04, resulting in no multi-touch - it's amazing how clunky resorting to scroll bars seems now. Anyway, it turns out Dell are not thoroughly supporting the 'Alps' trackpads used on their latest models, which is a shame, as it results in reduced functionality out of the box for a raft of their laptops. (See bug report.)
Fortunately, there is a fix (tested on Xubuntu 12.04):
First, download psmouse-alps-1.3. Then (using sudo / root):
- Extract the folder psmouse-alps-1.3 to /usr/src
- cd to /usr/src
- dkms add psmouse-alps-1.3
- dkms autoinstall
- rmmod psmouse && modprobe psmouse
That's it! Working multitouch! :-)