I have a system that uses LDAP. Originally I set this up as a stand-alone until all my company's security issues were mitigated. The problem is that on the GDM login, it does not display the name. I have this set up on our RHEL servers but not my laptop, so I log in as a local user and ssh to the servers. I can SU (or SUDO) to the LDAP user. I do have a local user set up with the same userid and group, but a separate home directory. I probably missed something somewhere.