lightdm-ubuntu/lightdm.pam

   1 #%PAM-1.0
   2 auth requisite pam_nologin.so
   3 auth required pam_env.so
   4 auth required pam_unix.so
   5 auth optional pam_gnome_keyring.so
   6 account required pam_unix.so
   7 session required pam_limits.so
   8 session required pam_unix.so
   9 password required pam_unix.so
  10 auth optional pam_gnome_keyring.so
  11 session optional pam_gnome_keyring.so auto_start