systemd/man/systemd-sleep.conf.xml
Zbigniew Jędrzejewski-Szmek 19adb8a320 systemd-sleep: add support for freeze and standby
A new config file /etc/systemd/sleep.conf is added.
It is parsed by systemd-sleep and logind. The strings written
to /sys/power/disk and /sys/power/state can be configured.
This allows people to use different modes of suspend on
systems with broken or special hardware.

Configuration is shared between systemd-sleep and logind
to enable logind to answer the question "can the system be
put to sleep" as correctly as possible without actually
invoking the action. If the user configured systemd-sleep
to only use 'freeze', but current kernel does not support it,
logind will properly report that the system cannot be put
to sleep.

https://bugs.freedesktop.org/show_bug.cgi?id=57793
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=7e73c5ae6e7991a6c01f6d096ff8afaef4458c36
http://lists.freedesktop.org/archives/systemd-devel/2013-February/009238.html

SYSTEM_CONFIG_FILE and USER_CONFIG_FILE defines were removed
since they were used in only a few places and with the
addition of /etc/systemd/sleep.conf it becomes easier to just
append the name of each file to the dir name.
2013-05-06 22:51:57 +02:00

182 lines
6.6 KiB
XML

<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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<refentry id="systemd-sleep.conf">
<refentryinfo>
<title>systemd-sleep.conf</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Zbigniew</firstname>
<surname>Jędrzejewski-Szmek</surname>
<email>zbyszek@in.waw.pl</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-sleep.conf</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-sleep.conf</refname>
<refpurpose>Suspend and hibernation configuration file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/etc/systemd/sleep.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>systemd</command> supports three general
power-saving modes:</para>
<variablelist>
<varlistentry>
<term>suspend</term>
<listitem><para>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.
</para></listitem>
</varlistentry>
<varlistentry>
<term>hibernate</term>
<listitem><para>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.
</para></listitem>
</varlistentry>
<varlistentry>
<term>hybrid-sleep</term>
<listitem><para>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.
</para></listitem>
</varlistentry>
</variablelist>
<para>Settings in this file determine what strings
will be written to
<filename>/sys/power/disk</filename> and
<filename>/sys/power/state</filename> by
<citerefentry><refentrytitle>systemd-sleep</refentrytitle><manvolnum>8</manvolnum></citerefentry>
when
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
attempts to suspend or hibernate the machine.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options can be configured in the
<literal>[Sleep]</literal> section of
<filename>/etc/systemd/sleep.conf</filename>:</para>
<variablelist class='systemd-directives'>
<varlistentry>
<term><varname>SuspendMode=</varname></term>
<term><varname>HibernateMode=</varname></term>
<term><varname>HybridSleepMode=</varname></term>
<listitem><para>The string to be written to
<filename>/sys/power/disk</filename> by,
respectively,
<citerefentry><refentrytitle>systemd-suspend.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, or
<citerefentry><refentrytitle>systemd-hybrid-sleep.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
More than one value can be specified by seperating
multiple values with commas. They will be tried
in turn, until one is written without error. If
neither suceeds, the operation will be aborted.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>SuspendState=</varname></term>
<term><varname>HibernateState=</varname></term>
<term><varname>HybridSleepState=</varname></term>
<listitem><para>The string to be written to
<filename>/sys/power/state</filename> by,
respectively,
<citerefentry><refentrytitle>systemd-suspend.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, or
<citerefentry><refentrytitle>systemd-hybrid-sleep.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
More than one value can be specified by seperating
multiple values with commas. They will be tried
in turn, until one is written without error. If
neither suceeds, the operation will be aborted.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Example: freeze</title>
<para>Example: to exploit the <quote>freeze</quote> mode added
in Linux 3.9, one can use <command>systemctl suspend</command>
with
<programlisting>
[Sleep]
SuspendState=freeze
</programlisting></para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd-sleep</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-suspend.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-hibernate.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-hybrid-sleep.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>