How to Disable Ubuntu Login Password on Mini PC

Many Mini PC users running Ubuntu prefer automatic login without entering a password at startup. Below are three reliable methods compatible with most Intel and AMD Mini PCs.

Method 1: Edit GDM Configuration File (Default for GNOME)

For Ubuntu Mini PCs using the GNOME Display Manager (GDM):

1. Open Terminal and back up the configuration (optional):

bash

Copy Code

sudo cp /etc/gdm3/greeter.dconf-defaults /etc/gdm3/greeter.dconf-defaults.backup

1. Edit the file:

bash

Copy Code

sudo nano /etc/gdm3/greeter.dconf-defaults

1. Add or update these lines:

plaintext

Copy Code

[daemon]

AutomaticLoginEnable=true

1. Save and reboot to apply automatic login.

Method 2: Use gsettings Commands (Quick & Direct)

Run these commands in Terminal for GNOME-based Mini PCs. Replace yourusername with your actual account name:

bash

Copy Code

gsettings set org.gnome.login-screen disable-user-list true

gsettings set org.gnome.login-screen enable-automatic-login true

gsettings set org.gnome.login-screen auto-login-delay 0

gsettings set org.gnome.login-screen auto-login-user-name yourusername

Reboot for changes to take effect.

Method 3: Modify LightDM Configuration (Legacy Ubuntu / Lightweight Desktops)

For older Ubuntu versions or LightDM used in low-power Mini PCs:

1. Open the configuration file:

bash

Copy Code

sudo nano /etc/lightdm/lightdm.conf

1. Add these lines (replace yourusername):

plaintext

Copy Code

[SeatDefaults]

autologin-user=yourusername

autologin-user-timeout=0

1. Save and restart your Mini PC.

Notes

Mini PCs are widely used in industrial control, digital signage, POS, home theater and vehicle scenarios. Disabling the Ubuntu login password improves efficiency and convenience. All methods are safe, stable and do not affect system performance.