I set my Linux network server/PDC's security level to level 5/Paranoid and at that level regular users cannon log into KDE. I set the permissions on such files as /usr/X11R6 to the defaults for level 4, but this still does not fix the problem. What might be the error? When a regular user attempts to login, they're authenticated, then the screen goes dark for a moment and the login screen reappears.

Thanks,
Mike

I had the same problem on a fresh upgrade from 9.0. But to make things even worse, I manually turned on the user list. Now I can't login as root, because it doesn't show in the list. And I can't login as a user, because it logs me out immediately. Now how dumb am I :-o

So is there a way of editting from the command line, the values to turn off the list feature and/or allowing the standard accounts to login?

Try entering Virtual Console 1 (ctrl+alt+F1) and logging in as a regular user, then SU to root (type su and enter the root password). Now go to /etc/passwd and find your user id and group id (fomat will be usernameassword (or "X" if shadow pws are on):user id:group id:shell::
change your uid (will prolly be 500-something) and gid (also likely 500-something, oftentimes the same as your user id) to 0. Record what your previous ids were, though, since you'll need to manually change them back. Now save the file and login with your username. You username will become root the moment you login. Now change the security settings back to what they should be. The system will likely warn you when you login that another user has a UID and GID of "0"--that's the "exploit" we just used to get around your maximum security, so don't worry about it!
Now open /etc/passwd and change the values back to what they were, then reboot the computer. All should be well at this point, and we've patched the security hole we opened a moment ago so the system won't complain anymore.

Mike

It seems for what ever reason, the PATH was not setup properly during the upgrade. I found another post in here last night suggested a path issue. So I manually edited the profile for my account in command line and SUCCESS!

So I logged into KDE and edited the common profile and all the accounts work just fine now.

Thanks for the help