>>> >>> I know I have successfully set up LDAP *and* NFS, because I can log in >>> remotely with SSH as well as on a terminal. However, when I try to log >> in >>> with GDM or XDM, it will accept my password, black out the screen, and >>> then return to either GDM or XDM. I *can*, however, log in with a local >>> account.
In my experience, if there's an auth failure, GDM prints a warning on the login window, rather than blacking out the screen, and dumping you back to a login window. Seeing as you can auth via other methods, I don't think this is the case. You can probably find some info as to what's happening in the /var/log/gdm/* log files. To me, it sounds to me like there's a crash somewhere in your gnome session. Is there any relevant information in the ldap user's ~/.xsession-errors file? I've also seen this happen if there's a corrupted session state file (~/.gnome2/session). You can try removing that, and see if if clears anything up for you. -Steve