Comment 4 for bug 870475

It seems this is a wish, that lives for a long time. In Bug #116919 additional approaches are listed to disable the touchpad, when plugging a mouse.

For my Lenovo x121e the udev rule, provided by Bug #116919 does not work out of the box and I did not find the problem, yet. But for sure it would be great, if a "disable touchpad, when usb mouse is plugged" option would exist.