systemd/man/systemd-hibernate-resume@.service.xml

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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  Copyright 2014 Ivan Shapovalov

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<refentry id="systemd-hibernate-resume@.service">

        <refentryinfo>
                <title>systemd-hibernate-resume@.service</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Ivan</firstname>
                                <surname>Shapovalov</surname>
                                <email>intelfx100@gmail.com</email>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>systemd-hibernate-resume@.service</refentrytitle>
                <manvolnum>8</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd-hibernate-resume@.service</refname>
                <refname>systemd-hibernate-resume</refname>
                <refpurpose>Resume from hibernation</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <para><filename>systemd-hibernate-resume@.service</filename></para>
                <para><filename>/usr/lib/systemd/systemd-hibernate-resume</filename></para>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para><filename>systemd-hibernate-resume@.service</filename>
                initiates the resume from hibernation. It is
                instantiated with the device to resume from as the
                template argument.</para>

                <para><filename>systemd-hibernate-resume</filename> only supports
                the in-kernel hibernation implementation, known as
                <ulink url="https://www.kernel.org/doc/Documentation/power/swsusp.txt">swsusp</ulink>.
                Internally, it works by writing the major:minor of specified
                device node to <filename>/sys/power/resume</filename>.</para>

                <para>Failing to initiate a resume is not an error condition.
                It may mean that there was no resume image (e. g. if the
                system has been simply powered off and not hibernated). In
                such case, the boot is ordinarily continued.</para>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                        <citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                </para>
        </refsect1>

</refentry>