Keyboard unsresponsive at login screen

[brunold]

What are keyboard[0] and keyboard[2]?

You can have in the xorg.conf more sections for input devices configured like this:

...
Section "InputDevice"
  Driver       "kbd"
  Identifier   "Keyboard[0]"
...

The identifier is the important one.
In the section ServerLayout you then can define which of that InputDevice configuration should be used:

...
Section "ServerLayout"
  Identifier   "Layout[all]"
  InputDevice  "Keyboard[0]"
...

So you can check if you have the two configurations for keyboard 0 and 2 and see how they look like.

Rainer