First, sorry for my English.
I have a Acer-E5 574G laptop installed Elementary OS 0.4 Loki. Sometime my touch pad will suddenly stopped working and I have to reboot my laptop to get it works again.
The touch pad is fine on Windows 10.
My laptop specs: CPU: Intel i7 6500U RAM: 8GB DDR3L
Touch pad driver: Libinput
Elementary OS version: 0.4 Loki stable (up-to-date), using proprietary drivers for all components