• First open a terminal and type su then your root password that you created when installing your Debian 11.

  • Install Emacs with apt install emacs.

  • Stay in root terminal and type emacs /etc/gdm3/daemon.conf. This command opens the file daemon.conf in Emacs.

  • Before:

[daemon]
# Uncomment the line below to force the login screen to use Xorg
#WaylandEnable=false

# Enabling automatic login
# AutomaticLoginEnable=true
# AutomaticLogin=user1

# Enabling timed login
#  TimedLoginEnable = true
#  TimedLogin = user1
#  TimedLoginDelay = 10

AutomaticLoginEnable=False
AutomaticLogin=douyipu

[security]
  • After:
[daemon]
# Uncomment the line below to force the login screen to use Xorg
#WaylandEnable=false

# Enabling automatic login
AutomaticLoginEnable=true
AutomaticLogin=root

# Enabling timed login
#  TimedLoginEnable = true
#  TimedLogin = user1
#  TimedLoginDelay = 10

#  AutomaticLoginEnable=False
#  AutomaticLogin=douyipu

[security]
AllowRoot=true

  • Open file /etc/pam.d/gdm-password, /etc/pam.d/gdm-autologin and /etc/pam.d/gdm-fingerprint.

  • Before:

#%PAM-1.0
auth    requisite       pam_nologin.so
auth	required	pam_succeed_if.so user != root quiet_success
  • After:
#%PAM-1.0
auth    requisite       pam_nologin.so
#auth	required	pam_succeed_if.so user != root quiet_success
  • Reboot.