I'm using Ubuntu 18.04 on a Lenovo Thinkpad E-430. Since my mouse was jumping all over the place, I gave this command.
sudo apt-get install xserver-xorg-input-synaptics
After rebooting, my keyboard wasn't working. So I turned the on-screen keyboard on and removed synaptics.
sudo apt remove xserver-xorg-input-synaptics
After rebooting, now the trackpad/mouse is also not working. This makes my computer unusable. How can I recover it?
Thank you in advance.