Hello Linux Geeksters.
By default, some laptops (like: Dell Vostro 3360 or Dell Inspiron 17R 7720 SE) have some touchpad issues when using Ubuntu 13.04, like the 2-finger scrolling not working. This is a fix that worked for me:
Delete the old dkms driver:
$ cd /var/lib/dkms/psmouse/
$ rm -rf alps-dst-0.4
Download the new driver from here:
$ wget https://www.linuxwind.org/download/psmouse-alps-1.3-alt.tbz
Next, do this tweaks:
$ tar xvf psmouse-alps-1.3-alt.tbz
$ cp -afr usr/src/psmouse-alps-1.3/ /usr/src/
$ dkms add psmouse/alps-1.3
$ dkms autoinstall
$ rmmod psmouse && modprobe psmouse