getty repeating too quickly port /dev/ttyv8

[n dhert]

I upgraded a FreebSD 7.2 to 8.0. That system had KDE and KDM as window
manager.
Now, after rebooting I get two messages on the console
init: getty repeating too quickly on port /dev/ttyv8, sleeping 30 secs.

I can login at the console in text mode (Ctrl-Alt-F1, F2, ... F8),
Ctrl-Alt-F9 does not do anything but giving that getty repeating ... error
My /etc/ttys has:
ttyv8 "/usr/local/bin/kdm -nodeamon" xterm  on secure
Of course I can comment it out, then the errors don't pop up, but that not
what I want

How can I solve this?