# sddm/sddm

QML based X11 and Wayland display manager

Repository: https://github.com/sddm/sddm
Canonical: https://ross.abutalabs.com/products/sddm
Language: C++
License: GPL-2.0
License Family: copyleft
Topics: qml, xorg, wayland, qtquick
Last push: 2026-08-19T10:45:49+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 8, longevity 100
- inputs: {"age_days": 4976, "days_push": 14, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2335, forks 384 (observed 2026-08-28T04:06:38.020308+00:00)

## What it is
SDDM is a QML-based display manager (login screen) for Linux supporting both X11 and Wayland sessions. It is highly themeable via QtQuick, letting designers build smooth, animated login interfaces with provided UI components.

## Use cases
- replace LightDM or GDM on a Linux desktop
- create a custom animated login screen theme
- run a Wayland session with a graphical login manager
- customize the greeter UI with QtQuick/QML
- set up a display manager without GNOME or KDE defaults
- show user avatars on the login screen

## When to choose
- you want a lightweight, themeable display manager for X11 or Wayland
- you need full control over login screen design with QML
- you run a KDE Plasma or other Qt-based desktop

## When to avoid
- you need a display manager for macOS or Windows
- you want a zero-configuration login screen with no theming effort
- your system lacks Qt 5.15+ and you cannot install it

## Facets
- artifact type: application
- maturity: active
- function: auth, gui, ui-components, security
- domain: desktop-applications, operating-systems, security, cross-platform
- platform: cpp
- tags: display-manager, login-screen, greeter, qml-themes, x11, wayland, qt, linux, desktop

## Member repositories
- sddm/sddm (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:38.020308+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:37:44.932483+00:00, confidence not recorded.
  - readme: https://github.com/sddm/sddm (fetched 2026-08-28T04:06:38.020308+00:00, sha 7a2332592cdc)
- Data as of 2026-08-30T08:39:29.467469+00:00.