How do I get the touchpad working on an ASUS N551V?

I have ASUS N551V with fresh install of Ubuntu 14.04.3 and my touchpad is not working.

I tried в few solutions from Интернет, but не success.

For example, several solutions I have tried:

• editing this line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash psmouse.proto=bare" in /etc/default/grub

• using dconf Редактор, where the touchpad is enabled

Хан someone help with this?

Thanks