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Simple Desktop Display Manager (SDDM) is a display manager (a graphical login program) for the X11 and Wayland windowing systems. [5] SDDM was written from scratch in C++11 and supports theming via QML. [6] SDDM is free and open-source software subject to the terms of the GNU General Public License version 2 or later. [4]
LightDM is a free and open-source X display manager that aims to be lightweight, fast, extensible and multi-desktop. [5] It can use various front-ends to draw the user interface, [6] also called Greeters. [7]
The Wayland Display Server project was started by Red Hat developer Kristian Høgsberg in 2008. [15]Beginning around 2010, Linux desktop graphics have moved from having "a pile of rendering interfaces... all talking to the X server, which is at the center of the universe" towards putting the Linux kernel and its components (i.e. Direct Rendering Infrastructure (DRI), Direct Rendering Manager ...
The Direct Rendering Manager and KMS are part of the Linux kernel. The KMS does only the mode setting. Mode setting is a software operation that activates a display mode (screen resolution, color depth, and refresh rate) for a computer's display controller by using VESA BIOS Extensions or UEFI Graphics extensions (on more modern computers).
systemd is a software suite that provides an array of system components for Linux [7] operating systems. The main aim is to unify service configuration and behavior across Linux distributions. [8] Its primary component is a "system and service manager" — an init system used to bootstrap user space and manage user processes.
The X Display Manager (XDM) is the default display manager for the X Window System. It is a bare-bones X display manager. It is a bare-bones X display manager. It was introduced with X11 Release 3 in October 1988, to support the standalone X terminals that were just coming onto the market.
On Linux, a kernel panic causes keyboard LEDs to blink as a visual indication of a critical condition. [14] As of Linux 6.10, drm_panic was merged allowing DRM drivers to support drawing a panic screen to inform the user that a panic occurred. This allows a panic screen to appear even when a display server was running when the panic occurred. [15]
KDE Display Manager was based on the source code of X display manager [1] and was the default display manager of the KDE Software Compilation, until it was retired in KDE Plasma 5 in favour of SDDM. [2] KDM allowed the user to choose a desktop environment or window manager at login. KDM used the Qt application framework.