Re: Major Surprise with xdm on 3.7

[Darrin Chandler]

I think there are people doing what you're describing. Try Googling on 
xdm+ttys or xdm+lock.down and you'll see some tips for FreeBSD, Linux, 
etc. One of these might work for you.

I once got into xdm the way you describe and had a devil of a time 
getting back out. That was the first and last time I used xdm. But if 
that's what you want to do then more power to you.