ubuntu14.04 Disable Touchpad and restore Touchpad

1. Use XInput list to view the ID associated with the touchpad, the following is the output of the machine, do not understand why the mouse!!!

[Email protected]:~$ xinput List
? Virtual core pointer id=2 [master pointer (3)]
? ? Virtual core XTEST pointer id=4 [slave pointer (2)]
? ? HID Compliant-mouse hid Compliant-mouse id=11 [slave pointer (2)]
? ? PS/2 Generic Mouse id=14 [slave pointer (2)]
? Virtual core keyboard id=3 [Master keyboard (2)]
? Virtual Core XTEST keyboard id=5 [slave keyboard (3)]
? Power Button id=6 [slave keyboard (3)]
? Video Bus id=7 [slave keyboard (3)]
? Video Bus id=8 [slave keyboard (3)]
? Power Button id=9 [slave keyboard (3)]
? Sleep Button id=10 [slave keyboard (3)]
? Integrated Webcam id=12 [slave keyboard (3)]
? At translated Set 2 keyboard id=13 [slave keyboard (3)]
? Dell WMI hotkeys id=16 [slave keyboard (3)]
2. From the first step you can get the id=14 of the touchpad, that on-board

2.1: No touch pad

XInput Disable 14

2.2 Restoring the Touchpad

XInput Enable 14

！！！ Shortcomings of the Welcome to correct!!!

ubuntu14.04 Disable Touchpad and restore Touchpad