|
NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION DIRECTORIES AND PRECEDENCE | OPTIONS | EXAMPLE: FREEZE | SEE ALSO | COLOPHON |
SYSTEMD-SLEEP.CONF(5) systemd-sleep.conf SYSTEMD-SLEEP.CONF(5)
systemd-sleep.conf, sleep.conf.d - Suspend and hibernation
configuration file
/etc/systemd/sleep.conf
/etc/systemd/sleep.conf.d/*.conf
/run/systemd/sleep.conf.d/*.conf
/usr/lib/systemd/sleep.conf.d/*.conf
systemd supports three general power-saving modes:
suspend
a low-power state where execution of the OS is paused, and
complete power loss might result in lost data, and which is fast
to enter and exit. This corresponds to suspend, standby, or
freeze states as understood by the kernel.
hibernate
a low-power state where execution of the OS is paused, and
complete power loss does not result in lost data, and which might
be slow to enter and exit. This corresponds to the hibernation as
understood by the kernel.
hybrid-sleep
a low-power state where execution of the OS is paused, which
might be slow to enter, and on complete power loss does not
result in lost data but might be slower to exit in that case.
This mode is called suspend-to-both by the kernel.
Settings in these files determine what strings will be written to
/sys/power/disk and /sys/power/state by systemd-sleep(8) when
systemd(1) attempts to suspend or hibernate the machine.
The default configuration is defined during compilation, so a
configuration file is only needed when it is necessary to deviate
from those defaults. By default, the configuration file in
/etc/systemd/ contains commented out entries showing the defaults as
a guide to the administrator. This file can be edited to create local
overrides.
When packages need to customize the configuration, they can install
configuration snippets in /usr/lib/systemd/*.conf.d/. Files in /etc/
are reserved for the local administrator, who may use this logic to
override the configuration files installed by vendor packages. The
main configuration file is read before any of the configuration
directories, and has the lowest precedence; entries in a file in any
configuration directory override entries in the single configuration
file. Files in the *.conf.d/ configuration subdirectories are sorted
by their filename in lexicographic order, regardless of which of the
subdirectories they reside in. If multiple files specify the same
option, the entry in the file with the lexicographically latest name
takes precedence. It is recommended to prefix all filenames in those
subdirectories with a two-digit number and a dash, to simplify the
ordering of the files.
To disable a configuration file supplied by the vendor, the
recommended way is to place a symlink to /dev/null in the
configuration directory in /etc/, with the same filename as the
vendor configuration file.
The following options can be configured in the "[Sleep]" section of
/etc/systemd/sleep.conf or a sleep.conf.d file:
SuspendMode=, HibernateMode=, HybridSleepMode=
The string to be written to /sys/power/disk by, respectively,
systemd-suspend.service(8), systemd-hibernate.service(8), or
systemd-hybrid-sleep.service(8). More than one value can be
specified by separating multiple values with whitespace. They
will be tried in turn, until one is written without error. If
neither succeeds, the operation will be aborted.
SuspendState=, HibernateState=, HybridSleepState=
The string to be written to /sys/power/state by, respectively,
systemd-suspend.service(8), systemd-hibernate.service(8), or
systemd-hybrid-sleep.service(8). More than one value can be
specified by separating multiple values with whitespace. They
will be tried in turn, until one is written without error. If
neither succeeds, the operation will be aborted.
Example: to exploit the “freeze” mode added in Linux 3.9, one can use
systemctl suspend with
[Sleep]
SuspendState=freeze
systemd-sleep(8), systemd-suspend.service(8),
systemd-hibernate.service(8), systemd-hybrid-sleep.service(8),
systemd(1), systemd.directives(7)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2017-07-05. If you dis‐
cover any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
systemd 234 SYSTEMD-SLEEP.CONF(5)
Pages that refer to this page: systemd.directives(7), systemd.index(7), systemd-suspend.service(8)