Best way to stop X from starting?

["Rob Dupcak" <rob.dupcak@amd.com>]

Hi,

I've managed to hork up my srm based LX164 to the point where I can't do 
anything with it after it boots.  I am 99.99% sure that it is a problem 
with X.  It starts xdm, the screen flickers a few times and then it just 
freezes with a black (or really dark grey) screen.  No mouse, no 
keyboard, no nothing.

I just recently added the BusID line to the Device section of my 
XF86Config-4 file since X definitely wasn't working without it.  (Kept 
telling me that it couldn't find the device)  Once I added that line, it 
briefly showed signs of life before going into this hang state.

I'm guessing that I can stop X from starting by moving the graphics card 
to a different PCI slot so that the x server wont find it, but is there 
another more elegant solution to stopping X?  I can't get to a prompt so 
editing various files is not an option unless someone has some magic 
incantations I can mumble.

Thanks for any help.

- Rob