he keyboard locked is probably due to the console driver (pccons or
syscon) disabling the X mode for the X server.
 
This can be tested quite easily just exit out of the server via twm's
menu. I have never seen a case except when the server or the system 
crashes in which you can't exit out of the server. Forgot there is
another case.
 
If you are running kermit and have a session with a remote host,
try to exit the server by pressing ctrl-alt-backspace, xinit    
will hang and just about the only way to gain control of the       
console is to kill the parent process of the login session.

So something weird its happening with the com driver and killing
a server.

Hope this helps,
	Amancio

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