man/systemd-sleep.conf.xml

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   5 <!--
   6   SPDX-License-Identifier: LGPL-2.1+
   7
   8   This file is part of systemd.
   9
  10   Copyright 2013 Zbigniew Jędrzejewski-Szmek
  11 -->
  12
  13 <refentry id="systemd-sleep.conf"
  14           xmlns:xi="http://www.w3.org/2001/XInclude">
  15   <refentryinfo>
  16     <title>systemd-sleep.conf</title>
  17     <productname>systemd</productname>
  18
  19     <authorgroup>
  20       <author>
  21         <contrib>Developer</contrib>
  22         <firstname>Zbigniew</firstname>
  23         <surname>Jędrzejewski-Szmek</surname>
  24         <email>zbyszek@in.waw.pl</email>
  25       </author>
  26     </authorgroup>
  27   </refentryinfo>
  28
  29   <refmeta>
  30     <refentrytitle>systemd-sleep.conf</refentrytitle>
  31     <manvolnum>5</manvolnum>
  32   </refmeta>
  33
  34   <refnamediv>
  35     <refname>systemd-sleep.conf</refname>
  36     <refname>sleep.conf.d</refname>
  37     <refpurpose>Suspend and hibernation configuration file</refpurpose>
  38   </refnamediv>
  39
  40   <refsynopsisdiv>
  41     <para><filename>/etc/systemd/sleep.conf</filename></para>
  42     <para><filename>/etc/systemd/sleep.conf.d/*.conf</filename></para>
  43     <para><filename>/run/systemd/sleep.conf.d/*.conf</filename></para>
  44     <para><filename>/usr/lib/systemd/sleep.conf.d/*.conf</filename></para>
  45   </refsynopsisdiv>
  46
  47   <refsect1>
  48     <title>Description</title>
  49
  50     <para><command>systemd</command> supports four general
  51     power-saving modes:</para>
  52
  53     <variablelist>
  54       <varlistentry>
  55         <term>suspend</term>
  56
  57         <listitem><para>a low-power state
  58         where execution of the OS is paused,
  59         and complete power loss might result
  60         in lost data, and which is fast to
  61         enter and exit. This corresponds to
  62         suspend, standby, or freeze states as
  63         understood by the kernel.
  64         </para></listitem>
  65       </varlistentry>
  66
  67       <varlistentry>
  68         <term>hibernate</term>
  69
  70         <listitem><para>a low-power state
  71         where execution of the OS is paused,
  72         and complete power loss does not
  73         result in lost data, and which might
  74         be slow to enter and exit. This
  75         corresponds to the hibernation as
  76         understood by the kernel.
  77         </para></listitem>
  78       </varlistentry>
  79
  80       <varlistentry>
  81         <term>hybrid-sleep</term>
  82
  83         <listitem><para>a low-power state
  84         where execution of the OS is paused,
  85         which might be slow to enter, and on
  86         complete power loss does not result in
  87         lost data but might be slower to exit
  88         in that case. This mode is called
  89         suspend-to-both by the kernel.
  90         </para></listitem>
  91       </varlistentry>
  92
  93       <varlistentry>
  94         <term>suspend-then-hibernate</term>
  95
  96         <listitem><para>A low power state where the system is initially suspended
  97         (the state is stored in RAM). If not interrupted within the delay specified by
  98         <command>HibernateDelaySec=</command>, the system will be woken using an RTC
  99         alarm and hibernated (the state is then stored on disk).
 100         </para></listitem>
 101       </varlistentry>
 102
 103     </variablelist>
 104
 105     <para>Settings in these files determine what strings
 106     will be written to
 107     <filename>/sys/power/disk</filename> and
 108     <filename>/sys/power/state</filename> by
 109     <citerefentry><refentrytitle>systemd-sleep</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 110     when
 111     <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 112     attempts to suspend or hibernate the machine.
 113     See
 114     <citerefentry><refentrytitle>systemd.syntax</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 115     for a general description of the syntax.</para>
 116   </refsect1>
 117
 118   <xi:include href="standard-conf.xml" xpointer="main-conf" />
 119
 120   <refsect1>
 121     <title>Options</title>
 122
 123     <para>The following options can be configured in the
 124     <literal>[Sleep]</literal> section of
 125     <filename>/etc/systemd/sleep.conf</filename> or a
 126     <filename>sleep.conf.d</filename> file:</para>
 127
 128     <variablelist class='systemd-directives'>
 129       <varlistentry>
 130         <term><varname>SuspendMode=</varname></term>
 131         <term><varname>HibernateMode=</varname></term>
 132         <term><varname>HybridSleepMode=</varname></term>
 133
 134         <listitem><para>The string to be written to
 135         <filename>/sys/power/disk</filename> by,
 136         respectively,
 137         <citerefentry><refentrytitle>systemd-suspend.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 138         <citerefentry><refentrytitle>systemd-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 139         <citerefentry><refentrytitle>systemd-hybrid-sleep.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, or
 140         <citerefentry><refentrytitle>systemd-suspend-then-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
 141         More than one value can be specified by separating
 142         multiple values with whitespace. They will be tried
 143         in turn, until one is written without error. If
 144         neither succeeds, the operation will be aborted.
 145         </para></listitem>
 146       </varlistentry>
 147
 148       <varlistentry>
 149         <term><varname>SuspendState=</varname></term>
 150         <term><varname>HibernateState=</varname></term>
 151         <term><varname>HybridSleepState=</varname></term>
 152
 153         <listitem><para>The string to be written to
 154         <filename>/sys/power/state</filename> by,
 155         respectively,
 156         <citerefentry><refentrytitle>systemd-suspend.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 157         <citerefentry><refentrytitle>systemd-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 158         <citerefentry><refentrytitle>systemd-hybrid-sleep.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, or
 159         <citerefentry><refentrytitle>systemd-suspend-then-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
 160         More than one value can be specified by separating
 161         multiple values with whitespace. They will be tried
 162         in turn, until one is written without error. If
 163         neither succeeds, the operation will be aborted.
 164         </para></listitem>
 165       </varlistentry>
 166       <varlistentry>
 167         <term><varname>HibernateDelaySec=</varname></term>
 168
 169         <listitem><para>The amount of time in seconds
 170         that will pass before the system is automatically
 171         put into hibernate when using
 172         <citerefentry><refentrytitle>systemd-suspend-then-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
 173         </para></listitem>
 174       </varlistentry>
 175     </variablelist>
 176   </refsect1>
 177
 178   <refsect1>
 179     <title>Example: freeze</title>
 180
 181     <para>Example: to exploit the <quote>freeze</quote> mode added
 182     in Linux 3.9, one can use <command>systemctl suspend</command>
 183     with
 184     <programlisting>[Sleep]
 185 SuspendState=freeze</programlisting></para>
 186   </refsect1>
 187
 188   <refsect1>
 189     <title>See Also</title>
 190     <para>
 191       <citerefentry><refentrytitle>systemd-sleep</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 192       <citerefentry><refentrytitle>systemd-suspend.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 193       <citerefentry><refentrytitle>systemd-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 194       <citerefentry><refentrytitle>systemd-hybrid-sleep.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 195       <citerefentry><refentrytitle>systemd-suspend-then-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 196       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 197       <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
 198     </para>
 199   </refsect1>
 200
 201 </refentry>