from https://askubuntu.com/questions/1235067/touchpad-stopped-working-20-04
$ sudo vi /etc/modprobe.d/psmouse.conf
options psmouse synaptics_intertouch=1
APT::Default-Release "testing"; |
from https://askubuntu.com/questions/1235067/touchpad-stopped-working-20-04
$ sudo vi /etc/modprobe.d/psmouse.conf
options psmouse synaptics_intertouch=1