Version: 6.14.4-4I have to infirm the news from zi@bluemonk.de. Today's migration brought a new kdm with a new configuration file. I opted to restore the maintainer's version, and the problem came back.
For what it's worth, I tried again to login this time, and it worked well, no hang. I was able to login, logout (thank you keyboard shortcuts!), and then cleanly restart kdm from tty1.