Chapter 5. GDM
Chapter 5. GDM GDM is the GNOME Display Manager , which provides a graphical login environment. After the transition from GNOME 2 to GNOME 3, configuring GDM is only possible through systemd as it no longer supports other init systems. the gdm package The gdm package has replaced xorg-x11-xdm , which provided a legacy display login manager for the X Window System. As mentioned before, the gdm package provides the graphical login screen, shown shortly after boot up, log out, and when user-switching. GDM and logind GDM now uses logind for defining and tracking users. For more information, see Chapter 2, logind . System administrators can also set up automatic login manually in the GDM custom configuration file: /etc/gdm/custom.conf . custom.conf GDM configuration is now found in /etc/gdm/custom.conf . However for backwards compatibility, if /etc/gdm/gdm.conf is found it will be used instead of custom.conf . When upgrading, Red Hat recommends removing your old gdm.conf file and migrating any custom configuration to custom.conf . Getting More Information For more information on GDM , see Section 14.1, "What Is GDM?" . For information on configuring and managing user sessions, see Section 14.3, "User Sessions" . For information on customizing the login screen appearance, see Section 10.4, "Customizing the Login Screen" .