I am using an HP Pavilion laptop with an ELAN touchpad device, and on Ubuntu, I can not click using my touchpad. I can just drag my mouse around with the touchpad, but not click, right click or do any other action. If I use a touchpad, even by mistake, my external mouse does not work. To fix this (temporarily) I use Ctrl + Alt + F7 and Ctrl + Alt + F2 and this gets my external mouse working again. How can I fix this permanently and how can I get my touchpad to work?