I have been trying to configure suspend-then-hibernate but I am afraid I don’t find any way to do it. The following is an excerpt from man systemctl:
suspend-then-hibernate
Suspend the system and hibernate it after the delay specified in systemd-sleep.conf. This will trigger activation of
the special target unit suspend-then-hibernate.target. This command is asynchronous, and will return after the hybrid
sleep operation is successfully enqueued. It will not wait for the sleep/wake-up or hibernate/thaw cycle to complete.
Having searched for systemd-sleep.conf the only hit seems to be:
/usr/share/man/man5/systemd-sleep.conf.5.gz
man systemd-sleep
SYSTEMD-SUSPEND.SERVICE(8) systemd-suspend.service SYSTEMD-SUSPEND.SERVICE(8)
NAME
systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, systemd-suspend-then-hibernate.service,
systemd-sleep - System sleep state logic
SYNOPSIS
systemd-suspend.service
systemd-hibernate.service
systemd-hybrid-sleep.service
systemd-suspend-then-hibernate.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 and
pulled in by suspend-then-hibernate.target to execute system suspend with a timeout that will activate hibernate later.
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", "hybrid-sleep", or "suspend-then-hibernate" 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 react to system suspend/hibernation and resume, they should rather use the
Inhibitor interface[1].
Note that systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, and
systemd-suspend-then-hibernate.service should never be executed directly. Instead, trigger system sleep with a command such
as systemctl suspend or systemctl hibernate.
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-then-hibernate
Suspend, hibernate, suspend then 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)
Excerpt from man systemd-sleep:
Note that systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, and
systemd-suspend-then-hibernate.service should never be executed directly. Instead, trigger system sleep with a command such
as systemctl suspend or systemctl hibernate.
Running systemctl suspend-then-hibernate will immediately turn off the screen but the power button of the laptop is still on. So I am not sure how to take this any further. Otherwise the system hibernate and wakes up successfully to and from a swapfile.
I didn’t find anything relative this alternative mode of suspension-hibernation in ArchWiki. Maybe I overlooked something.
I’ll appreciate greatly any pointers to a solution.
.