We suggest starting with a simple double-tap in the top-left corner of the touchpad This should work if your laptop has a Synaptics Touchpad. It’s unlocked when the light in the corner of the touchpad ...
Ubuntu: If you're running Ubuntu on a laptop, and you want to disable the touchpad when you have it connected to an external keyboard or mouse, Touchpad-Indicator is a menubar applet that can help.
Running Mint 15 KDE. Dell Latitude laptop. I accidentally turned off my touchpad with some weird keystroke combination and now I can't get it back on. A pop-up message indicated I had turned it off ...