Comment 88 for bug 34501

I have a newish Lenovo Ideapad V460 with an Elan touchpad of some kind in it. I was experiencing some trouble as people described above, no mouse functionality in Xorg or GPM. I got the touchpad to work by doing:

rmmod psmouse
modprobe psmouse proto=imps

proto=exps also seems to work. No synaptics functionality seems to be present, but it does make the mouse work in Xorg without any other configuration changes.

added "option psmouse proto=imps" to /etc/modprobe.d/touchpad.conf to get the option to persist.

It's not a fix, but it does allow me to use the mouse on this machine now.