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linux/docs/display-managers/lightdm.md
Márcio Fernandes 6acd7c0a1f modified: README.md
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modified:   docs/display-managers/lightdm.md
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# LightDM
**LightDM** is a lightweight, cross-desktop display manager used to handle graphical logins on Linux systems. It provides the login screen (called a greeter) and manages user sessions, including authentication and session launching.
**🧭 Key Features of LightDM:**
- Lightweight and fast: Designed to use minimal system resources compared to heavier alternatives like GDM (GNOME Display Manager).
- Cross-desktop compatibility: Works with GNOME, KDE, Xfce, LXDE, and other desktop environments.
- Greeter flexibility: Supports multiple greeter front-ends, such as:
- LightDM GTK Greeter (default for many distros)
- Slick Greeter (used by Linux Mint)
- Webkit Greeter (HTML/CSS-based)
- Remote login support: Includes protocols like XDMCP and VNC for remote graphical sessions.
- Guest sessions and autologin: Can be configured for temporary guest accounts or automatic login.
**Install:**
``` bash
apt install lightdm
```
**Disable suspend black screen:**
```bash
# /etc/lightdm/lightdm.conf
[Seat:*]
xserver-command=X -s 0 dpms
```
**Lightdm auto login:**
```bash
# /etc/lightdm/lightdm.conf
[SeatDefaults]
autologin-user=$USERNAME_TO_AUTOLOGIN
autologin-user-timeout=5
# Uncomment the following, if running Unity
#greeter-session=unity-greeter
```