Session and seat management is not necessary for every setup, but it can be used to safely create temporary runtime directories, provide access to hardware devices and multi-seat capabilities, and control system shutdown.
D-Bus is an IPC (inter-process communication) mechanism used by userspace software in Linux. D-Bus can provide a system bus and/or a session bus, the latter being specific to a user session.
- To provide a system bus, you should enable the
dbusservice. This might require a system reboot to work properly.
- To provide a session bus, you can start a given program (usually a window manager or interactive shell) with dbus-run-session(1). Most desktop environments, if launched through an adequate display manager, will launch a D-Bus session themselves.
Note that some software assumes the presence of a system bus, while other software assumes the presence of a session bus.
elogind(8) is a standalone version of
systemd-logind, a service to manage user logins. This service provides
necessary features for most desktop environments and Wayland compositors. It can
also be one of the mechanisms for rootless Xorg.
To make use of its features, install the
elogind package and make sure the
system D-Bus is enabled. You might need to log out and in again.
If you're having any issues with
elogind, enable its
service, as waiting for a D-Bus activation can lead to issues.
elogind listens for and processes ACPI events related to
lid-switch activation and presses of power, suspend and hibernate keys.
This will conflict with the acpid(8) service
if it is installed and enabled. Either disable
acpid when enabling
ignore ACPI events in
logind.conf(5). There are several
configuration options, all starting with the keyword
Handle, that should be
ignore to avoid interfering with