File gdm-autologin.pamd of Package gdm

#%PAM-1.0
# GDM PAM configuration for autologin
auth     requisite      pam_nologin.so
auth     required       pam_permit.so
auth     optional       pam_gdm.so
auth     optional       pam_gnome_keyring.so
account  substack       common-account
account  include        postlogin-account
password substack       common-password
password include        postlogin-password
session  required       pam_loginuid.so
session  optional       pam_keyinit.so force revoke
session  substack       common-session
session  include        postlogin-session