I recently bought a Lenovo Ideapad 320 and installed Ubuntu 16.04.3 on it. Installation went well, but while typing my password I realised that my touchpad wasn't working. How can I find out what the problem is and solve it?
I have exactly your problem and case I have linux ubuntu 16.04.3 and lenovo ideapad 320
1) update your linux from software updater , i did all updates. 2) update security , and any other updates via command line 3) upgrade your kernel to latest, in my case i upgraded from 4.8 to 4.10.0
P.S I have 64 bit system. If i were you i can test with live cd ubuntu to proof its working. and it did work
References About upgrading i used something like this
sudo apt-get install --install-recommends linux-generic-hwe-16.04 xserver-xorg-hwe-16.04
and you can check your version by