Touchpad not working on Dell XPS L501x
Because it is not working only in Gnome 3 and Unity 3D, you can fix it like this :
- Install dconf-tools
- Launch it
dconf-editor - Search for:
/org/gnome/settings-daemon/peripherals/touchpad/ - Check "touchpad-enabled"
Here is the trick :
sudo modprobe -r psmouse
sudo modprobe psmouse proto=imps