Single Sign-On does not work after initial setup.

During the installation gdm packages are getting installed after LUM and NCL.  Therefore the entry "auth optional  pam_ncl_autologin.so" was not included into the /etc/pam.d/gdm file.

 

Edit the /etc/pam.d/gdm file to include "auth optional  pam_ncl_autologin.so" at the begining of the file.

See Example Below:

auth      optional    pam_ncl_autologin.so
auth      sufficient  pam_nam.so use_first_pass
account   sufficient  pam_nam.so
password  sufficient  pam_nam.so
session   optional    pam_nam.so
#%PAM-1.0
auth     include        common-auth
account  include        common-account
password include        common-password
session  required       pam_loginuid.so
session  include        common-session