I use XUbuntu. I updated recently. I have 105generic keyboard.

When I try to log in, some keys don't work as expected:

7,8,9,u,i,o,.,- give nonsense like ^[[1~
0 turns out to /
P gives *

These are all keys which can be typed together with fn to give another character.

• Why is this happening?


• How to make them work back normal?

EDIT:
I tried to reset keyboard settings, by:

sudo dpkg-reconfigure keyboard-configuration
sudo service keyboard-setup restart

Now, the keyboard behaves strange EVERYWHERE.
I work around this using an external keyboard, but this is annoying since I work on a notebook.

tl,dr

• when I press a key with a fn extra output, I get that one, or nonsense or nothing (nonsense in terminal, nothing everywhere else)


• to use real functions, e.g. changing audio volume with keys only, I have to press fn -> Fn-key is not broken, it's the software

EDIT2: anything was back in first state, after

• unchecking in keyboard-settings the box "use system-wide settings"


• and rebooting

So I am back were I cannot login, but can use for working the notebook keyboard.

Another symptom: I don't get any special characters using fn (the key), but I'm not sure whether I could do this before, but I think yes.

please note: I am quite sure I used the keyboard layout intel generic 105 ever since.

I don't know why this worked.

But I do know it worked.

Since only keys that react to fn key changed behavior, I thought fn was locked. (It wasn't)

So I turned on and off num lock (using fn+f11).

Surprisingly, the login screen worked back normal.