Upgraded Ubuntu from 15.10 to 16.04 and the touchpad now is not working, before it works normally, when you press button to toogle touchpad on your pc, it always display as disable.
If you type
If there is no support for your touchpad in the kernel your touchpad is detected then the problem is elsewhere. Typing
It will show X server has detected your touchpad. If your touchpad is in that list it may be possible to modify the X config.
To change grub file,
By way of
Save the file and then update grub using,
command. and then restart your OS,
Edit 50-synaptics.conf file :
Add the following lines:
Save , exit and reboot
Edit the grub file from,
You have updated from ubuntu 14.04 to 16.04 on a Acer V5 and the touchpad stoped working,
To install,then you solve this problem,