1SYSTEMD-SLEEP.CONF(5)         systemd-sleep.conf         SYSTEMD-SLEEP.CONF(5)
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NAME

6       systemd-sleep.conf, sleep.conf.d - Suspend and hibernation
7       configuration file
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SYNOPSIS

10       /etc/systemd/sleep.conf
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12       /etc/systemd/sleep.conf.d/*.conf
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14       /run/systemd/sleep.conf.d/*.conf
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16       /usr/lib/systemd/sleep.conf.d/*.conf
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DESCRIPTION

19       systemd supports three general power-saving modes:
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21       suspend
22           a low-power state where execution of the OS is paused, and complete
23           power loss might result in lost data, and which is fast to enter
24           and exit. This corresponds to suspend, standby, or freeze states as
25           understood by the kernel.
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27       hibernate
28           a low-power state where execution of the OS is paused, and complete
29           power loss does not result in lost data, and which might be slow to
30           enter and exit. This corresponds to the hibernation as understood
31           by the kernel.
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33       hybrid-sleep
34           a low-power state where execution of the OS is paused, which might
35           be slow to enter, and on complete power loss does not result in
36           lost data but might be slower to exit in that case. This mode is
37           called suspend-to-both by the kernel.
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39       Settings in these files determine what strings will be written to
40       /sys/power/disk and /sys/power/state by systemd-sleep(8) when
41       systemd(1) attempts to suspend or hibernate the machine.
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CONFIGURATION DIRECTORIES AND PRECEDENCE

44       Default configuration is defined during compilation, so a configuration
45       file is only needed when it is necessary to deviate from those
46       defaults. By default the configuration file in /etc/systemd/ contains
47       commented out entries showing the defaults as a guide to the
48       administrator. This file can be edited to create local overrides.
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50       When packages need to customize the configuration, they can install
51       configuration snippets in /usr/lib/systemd/*.conf.d/. Files in /etc/
52       are reserved for the local administrator, who may use this logic to
53       override the configuration files installed by vendor packages. The main
54       configuration file is read before any of the configuration directories,
55       and has the lowest precedence; entries in a file in any configuration
56       directory override entries in the single configuration file. Files in
57       the *.conf.d/ configuration subdirectories are sorted by their filename
58       in lexicographic order, regardless of which of the subdirectories they
59       reside in. If multiple files specify the same option, the entry in the
60       file with the lexicographically latest name takes precedence. It is
61       recommended to prefix all filenames in those subdirectories with a
62       two-digit number and a dash, to simplify the ordering of the files.
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64       To disable a configuration file supplied by the vendor, the recommended
65       way is to place a symlink to /dev/null in the configuration directory
66       in /etc/, with the same filename as the vendor configuration file.
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OPTIONS

69       The following options can be configured in the "[Sleep]" section of
70       /etc/systemd/sleep.conf or a sleep.conf.d file:
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72       SuspendMode=, HibernateMode=, HybridSleepMode=
73           The string to be written to /sys/power/disk by, respectively,
74           systemd-suspend.service(8), systemd-hibernate.service(8), or
75           systemd-hybrid-sleep.service(8). More than one value can be
76           specified by separating multiple values with whitespace. They will
77           be tried in turn, until one is written without error. If neither
78           succeeds, the operation will be aborted.
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80       SuspendState=, HibernateState=, HybridSleepState=
81           The string to be written to /sys/power/state by, respectively,
82           systemd-suspend.service(8), systemd-hibernate.service(8), or
83           systemd-hybrid-sleep.service(8). More than one value can be
84           specified by separating multiple values with whitespace. They will
85           be tried in turn, until one is written without error. If neither
86           succeeds, the operation will be aborted.
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EXAMPLE: FREEZE

89       Example: to exploit the “freeze” mode added in Linux 3.9, one can use
90       systemctl suspend with
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92           [Sleep]
93           SuspendState=freeze
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SEE ALSO

96       systemd-sleep(8), systemd-suspend.service(8), systemd-
97       hibernate.service(8), systemd-hybrid-sleep.service(8), systemd(1),
98       systemd.directives(7)
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102systemd 219                                              SYSTEMD-SLEEP.CONF(5)
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