1<?xml version="1.0"?>
2<!--*-nxml-*-->
3<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
4  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
5<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
6<refentry id="systemd-hibernate-resume@.service" conditional='ENABLE_HIBERNATE'>
7
8  <refentryinfo>
9    <title>systemd-hibernate-resume@.service</title>
10    <productname>systemd</productname>
11  </refentryinfo>
12
13  <refmeta>
14    <refentrytitle>systemd-hibernate-resume@.service</refentrytitle>
15    <manvolnum>8</manvolnum>
16  </refmeta>
17
18  <refnamediv>
19    <refname>systemd-hibernate-resume@.service</refname>
20    <refname>systemd-hibernate-resume</refname>
21    <refpurpose>Resume from hibernation</refpurpose>
22  </refnamediv>
23
24  <refsynopsisdiv>
25    <para><filename>systemd-hibernate-resume@.service</filename></para>
26    <para><filename>/usr/lib/systemd/systemd-hibernate-resume</filename></para>
27  </refsynopsisdiv>
28
29  <refsect1>
30    <title>Description</title>
31
32    <para><filename>systemd-hibernate-resume@.service</filename>
33    initiates the resume from hibernation. It is instantiated with the
34    device to resume from as the template argument.</para>
35
36    <para><filename>systemd-hibernate-resume</filename> only supports
37    the in-kernel hibernation implementation, known as
38    <ulink url="https://www.kernel.org/doc/Documentation/power/swsusp.txt">swsusp</ulink>.
39    Internally, it works by writing the major:minor of specified
40    device node to <filename>/sys/power/resume</filename>.</para>
41
42    <para>Failing to initiate a resume is not an error condition. It
43    may mean that there was no resume image (e. g. if the system has
44    been simply powered off and not hibernated). In such case, the
45    boot is ordinarily continued.</para>
46  </refsect1>
47
48  <refsect1>
49    <title>See Also</title>
50    <para>
51      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
52      <citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
53    </para>
54  </refsect1>
55
56</refentry>
57