|
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 four 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.
suspend-then-hibernate
A low power state where the system is initially suspended (the
state is stored in RAM). If not interrupted within the delay
specified by HibernateDelaySec=, the system will be woken using
an RTC alarm and hibernated (the state is then stored on disk).
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. See
systemd.syntax(7) for a general description of the syntax.
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/ or
/usr/local/lib/systemd/*.conf.d/. 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 in which of the subdirectories
they reside. When multiple files specify the same option, for options
which accept just a single value, the entry in the file with the
lexicographically latest name takes precedence. For options which
accept a list of values, entries are collected as they occur in files
sorted lexicographically.
Files in /etc/ are reserved for the local administrator, who may use
this logic to override the configuration files installed by vendor
packages. 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:
AllowSuspend=, AllowHibernation=, AllowSuspendThenHibernate=,
AllowHybridSleep=
By default any power-saving mode is advertised if possible (i.e.
the kernel supports that mode, the necessary resources are
available). Those switches can be used to disable specific modes.
If AllowHibernation=no or AllowSuspend=no is used, this implies
AllowSuspendThenHibernate=no and AllowHybridSleep=no, since those
methods use both suspend and hibernation internally.
AllowSuspendThenHibernate=yes and AllowHybridSleep=yes can be
used to override and enable those specific modes.
SuspendMode=, HibernateMode=, HybridSleepMode=
The string to be written to /sys/power/disk by, respectively,
systemd-suspend.service(8), systemd-hibernate.service(8),
systemd-hybrid-sleep.service(8), or
systemd-suspend-then-hibernate.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),
systemd-hybrid-sleep.service(8), or
systemd-suspend-then-hibernate.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.
HibernateDelaySec=
The amount of time the system spends in suspend mode before the
system is automatically put into hibernate mode, when using
systemd-suspend-then-hibernate.service(8). Defaults to 2h.
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-suspend-then-hibernate.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 2020-08-13. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2020-08-11.) If you discover 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 246 SYSTEMD-SLEEP.CONF(5)
Pages that refer to this page: 30-systemd-environment-d-generator(7) , systemd.index(7)