Dear Tr,

I suffer from the same "kind" of problem. I have older version of knoppix installed at my Hard Disk and after last apt-get upgrade the "loading" of the KDE stopped at Loading Desktop and if you wait 2-3 minutes you will see only the wallpaper of the screen nothing more...

Did you find any solution may be related to 45Xsession file???

What do you think??

Best Regards,
Mike Kranidis