Comment 24 for bug 1831710

Boot into Ubuntu 18.04, in terminal check> mokutil --sb-state
as Secure Boot will need to be disabled
Then do in terminal
sudo apt install git build-essential dkms
git clone https://github.com/jeremyb31/mouse-4.18.git
sudo dkms add ./mouse-4.18
sudo dkms install mouse/1.0

Reboot