How to configure Touchpad in Ubuntu 16.04?
Solution 1:
Have you tried xinput ?
xinput
This will show all your device, note the ID for your touchpad.
xinput --watch-props <device number>
Above command will show the properties for your device, if you can see a propertly lik "libinput Disable While Typing Enabled" you are good to go.
xinput set-prop 13 "libinput Disable While Typing Enabled" 1
The above command will fix it for you.
Regards, Shivam