I have upgraded to Ubuntu 12.04 and my touchpad is not working at times on rebooting. There is no touchpad tab on system settings-mouse and touchpad. I have tried using the first two answers given here. I have tried omega@debasmita-laptop:~$ synclient TouchpadOff=0 Couldn't find synaptics properties. No synaptics driver loaded? When I try to open synaptiks it says no touchpad detected. However, USB mouse is working fine so far. Is there a solution to the problem?