How to fix a touchpad that stops working after logging in to Ubuntu
January 28, 2019
The touchpad will work fine when viewing the login screen, but once logging in to GNOME and the GNOME startup sound plays, the touchpad stops working. The touchpad stops working. So do the buttons.
The easy way to get this fixed is to open a terminal (or hit CTRL+ALT+F1 in order to get a login prompt), and then once logged in, run the following command:
gconftool-2 --set --type boolean /desktop/gnome/peripherals/touchpad/touchpad_enabled true
After that, the touchpad should work.