I have encounter this problem as well. I'm on Ubuntu Edgy 6.10, happens on my friend's desktop too.
Version: ii gnome-screensaver 2.16.1-0ubuntu1 Pam: /etc/pam.d/gnome-screensaver: auth sufficient pam_unix.so Even if i use local user still can't unlock screen, when permission to /etc/libnss-ldap.conf is +r for root only. -- Unable to unlock screen when using ldap https://launchpad.net/bugs/64301 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs