[K12OSN] Help!

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Help!! I was making some changes to the server and shut it down for a bit, now I started it up again and I can't log in! Not on root or anything. And it doesn't even do that "pause" as though the password was wrong... it just beeps and nothing happens! What did I do?? I finally have all day to work on this thing and magically I can't log in.

The changes I made just before restarting were the "localmedia" bit to get floppies working, restricting the login menu to only KDE, and making some changes for the sound driver to ltsp.conf. I also ran a test script to create some accounts, but then I deleted them.

Any ideas? What can I do to fix it, or even just get back in?