[K12OSN] rdesktop timeouts?

[musicman]

Does anyone else have any trouble with rdesktop timeouts?

I'm getting them fairly frequently when trying to serve windows
desktops from the ltsp.

In in terminal services config on the win server, I've set the timeout
to 1 hour, but my users are getting black screens and the like if they
walk away from the computer for 20 minutes.

Sometimes they even just reboot themselves? thin clients rebooting
themselves is a bit uppity in my book, but what the hey, maybe I've
done somethign wrong again ;)

cheers

L.