No Proprietary drivers after enabling LDAP login?

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http://askubuntu.com – I have a 10.04 workstation that was running Compiz with Restricted nVidia drivers. I setup PAM to use LDAP authentication and mounted /home on NFS. I can now login via LDAP with NFS homes, but my restricted drivers are gone, and the Hardware Drivers tool doesn't show any restricted drivers as being available. How do I get restricted drivers working again? (HowTos)