After upgrading from 17.10 to 18.04 my keyboard suddenly stopped working when logged in via Gnome(also tried the other two options, gnome with wayland and unity) During login screen the keyboard is working though and i can change to a terminal via ctrl+alt+Fx. But once i login only the touchpad is working, i also tried plugging in an external keyboard, or connecting a bluetooth mouse wich is shown as being connected but not working. The model is a latitude E7440. Does anyone have any ideas?
First, check if Slow Keys is turned off in the Accessibility menu on the top right. If it's already turned off, try:
sudo apt-get install xserver-xorg-input-all
If it's already installed, reinstall it:
sudo apt-get --purge autoremove xserver-xorg-input-all sudo apt-get install xserver-xorg-input-all