According to Chris Winters:
>
>Even more weird things happen if you are running with virtual terminals, 
>but the original behavior (of the keystrokes being ignored) is the same.
>

As Michael said check you do not have a getty on the console that X is
using.  This is very easy to stuff up if you are using xdm (you don't
say if you are or not...).  If you are using xdm then add the
appropriate vt0x option to the xdm startup to ensure it picks a vt
that is not in use.

-- 
Brett Lymn, Computer Systems Administrator, British Aerospace Australia
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  What do you get when you cross a cantaloup with a dog?        Melancholy :-P