SYSTEMD-SUSPEND.SERVICE(8) systemd-suspend.service SYSTEMD-SUSPEND.SERVICE(8)
NAME
systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, systemd-sleep - System sleep
state logic
SYNOPSIS
systemd-suspend.service
systemd-hibernate.service
systemd-hybrid-sleep.service
/usr/lib/systemd/system-sleep
DESCRIPTION
systemd-suspend.service is a system service that is pulled in by suspend.target and is responsible for the
actual system suspend. Similarly, systemd-hibernate.service is pulled in by hibernate.target to execute the
actual hibernation. Finally, systemd-hybrid-sleep.service is pulled in by hybrid-sleep.target to execute
hybrid hibernation with system suspend.
Immediately before entering system suspend and/or hibernation systemd-suspend.service (and the other mentioned
units, respectively) will run all executables in /usr/lib/systemd/system-sleep/ and pass two arguments to
them. The first argument will be "pre", the second either "suspend", "hibernate", or "hybrid-sleep" depending
on the chosen action. Immediately after leaving system suspend and/or hibernation the same executables are
run, but the first argument is now "post". All executables in this directory are executed in parallel, and
execution of the action is not continued until all executables have finished.
Note that scripts or binaries dropped in /usr/lib/systemd/system-sleep/ are intended for local use only and
should be considered hacks. If applications want to be notified of system suspend/hibernation and resume,
there are much nicer interfaces available.
Note that systemd-suspend.service, systemd-hibernate.service, and systemd-hybrid-sleep.service should never be
executed directly. Instead, trigger system sleep states with a command such as "systemctl suspend" or similar.
Internally, this service will echo a string like "mem" into /sys/power/state, to trigger the actual system
suspend. What exactly is written where can be configured in the "[Sleep]" section of /etc/systemd/sleep.conf
or a sleep.conf.d file. See systemd-sleep.conf(5).
OPTIONS
systemd-sleep understands the following commands:
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
suspend, hibernate, hybrid-sleep
Suspend, hibernate, or put the system to hybrid sleep.
SEE ALSO
systemd-sleep.conf(5), systemd(1), systemctl(1), systemd.special(7), systemd-halt.service(8)
systemd 219 SYSTEMD-SUSPEND.SERVICE(8)
Back to main site | Back to man page index