Sddm

SDDM

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sddm greeter

Vendor: SDDM Development Team
Developer: Abdurrahman Avci
License: GPL
Web: SDDM project page

About

SDDM (Simple Desktop Display Manager) is the preferred Display Manager for KDE Plasma 5 and LXQt. It supports X11 and Wayland. Themes are supported by QML.

Features

Extremely themeable.
Support both of X11 and Wayland windowing systems.

Configuration

SDDM configuration is loaded on the following order:

All files in /usr/lib/sddm/sddm.conf.d in alphabetical order
All files in /etc/sddm.conf.d in alphabetical order
Finally from /etc/sddm.conf for compatibility

For example, we can find on tumbleweed that the main sddm.conf file is empty, and the configurations are on /usr/lib/sddm/sddm.conf.d.

See

$ man sddm.conf

for detailed options information.

On systemd controlled systems, SDDM should work out of the box since it defaults to using systemd-logind for session management.

HiDPI Support

As of version 0.15 HiDPI support was added.

To enable it for X11, add this to the corresponding configuration file

[X11]
EnableHiDPI=true

To enable it for Wayland

[Wayland]
EnableHiDPI=true

To change the DPI add -dpi {value} to the Server Arguments. For example to change the DPI for X11 to 192

[X11]
ServerArguments= -dpi 192

Autologin

SDDM supports automatic login through its configuration file, for example:

[Autologin]
User=john
Session=plasma.desktop

This configuration trigger a KDE Plasma session to be started for user john when the system is booted.

Troubleshooting

No User Icon

SDDM reads user icon from their ~/.face.icon or FacesDir/username.face.icon. SDDM user must have permissions to read those files.

External links

SDDM project page