I have an updated ubuntu system, one week old about the updates. I cannot work anymore with it, I installed a gnome extension (instructions here) and after that I restarted the shell (alt+F2 then r).
With the login screen the keyboard works, and I can switch to a tty too. But after login to any desktop enviroment (gnome shell, unity, gnome classic) the keyboard does not work, not even the leds of num lock neither caps lock. What can I do? How can I force to redetect my keyboard? There is a automated script that can do that? The mouse is working fine. Both the keyboard and the mouse are ps/2.