touchpad - Update driver ASUS N550JV for ubuntu 18.04

I install Ubuntu 18.04 on ASUS N550JV and Touchpad it does not work properly.

I see asus.com and I did not find any updates for Ubuntu

How do I update the touchpad on Ubuntu 18.04?

Thanks

UPDATE:

I run xinput:

⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                  id=13   [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)]
↳ Asus Wireless Radio Control               id=7    [slave  keyboard (3)]
↳ Video Bus                                 id=8    [slave  keyboard (3)]
↳ Video Bus                                 id=9    [slave  keyboard (3)]
↳ Sleep Button                              id=10   [slave  keyboard (3)]
↳ Asus WMI hotkeys                          id=11   [slave  keyboard (3)]
↳ AT Translated Set 2 keyboard              id=12   [slave  keyboard (3)]