"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
+ SPDX-License-Identifier: LGPL-2.1+
+
This file is part of systemd.
Copyright 2010 Lennart Poettering
<term><varname>HandleSuspendKey=</varname></term>
<term><varname>HandleHibernateKey=</varname></term>
<term><varname>HandleLidSwitch=</varname></term>
+ <term><varname>HandleLidSwitchExternalPower=</varname></term>
<term><varname>HandleLidSwitchDocked=</varname></term>
- <listitem><para>Controls whether logind shall handle the
+ <listitem><para>Controls how logind shall handle the
system power and sleep keys and the lid switch to trigger
actions such as system power-off or suspend. Can be one of
<literal>ignore</literal>,
<varname>HandleSuspendKey=</varname> and
<varname>HandleLidSwitch=</varname> default to
<literal>suspend</literal>.
- <varname>HandleLidSwitchDocked=</varname> defaults to
- <literal>ignore</literal>.
+ <varname>HandleLidSwitchExternalPower=</varname> is completely
+ ignored by default (for backwards compatibility) — an explicit
+ value must be set before it will be used to determine
+ behaviour. <varname>HandleLidSwitchDocked=</varname> defaults
+ to <literal>ignore</literal>.
<varname>HandleHibernateKey=</varname> defaults to
<literal>hibernate</literal>. If the system is inserted in a
docking station, or if more than one display is connected, the
action specified by <varname>HandleLidSwitchDocked=</varname>
+ occurs; if the system is on external power the action (if any)
+ specified by <varname>HandleLidSwitchExternalPower=</varname>
occurs; otherwise the <varname>HandleLidSwitch=</varname>
- action occurs.</para></listitem>
+ action occurs.</para>
+
+ <para>A different application may disable logind's handling of system power and
+ sleep keys and the lid switch by taking a low-level inhibitor lock
+ (<literal>handle-power-key</literal>, <literal>handle-suspend-key</literal>,
+ <literal>handle-hibernate-key</literal>, <literal>handle-lid-switch</literal>).
+ This is most commonly used by graphical desktop environments
+ to take over suspend and hibernation handling, and to use their own configuration
+ mechanisms. If a low-level inhibitor lock is taken, logind will not take any
+ action when that key or switch is triggered and the <varname>Handle*=</varname>
+ settings are irrelevant.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>HibernateKeyIgnoreInhibited=</varname></term>
<term><varname>LidSwitchIgnoreInhibited=</varname></term>
- <listitem><para>Controls whether actions triggered by the
- power and sleep keys and the lid switch are subject to
- inhibitor locks. These settings take boolean arguments. If
- <literal>no</literal>, the inhibitor locks taken by
- applications in order to block the requested operation are
- respected. If <literal>yes</literal>, the requested operation
- is executed in any case.
+ <listitem><para>Controls whether actions that <command>systemd-logind</command>
+ takes when the power and sleep keys and the lid switch are triggered are subject
+ to high-level inhibitor locks ("shutdown", "sleep", "idle"). Low level inhibitor
+ locks (<literal>handle-power-key</literal>, <literal>handle-suspend-key</literal>,
+ <literal>handle-hibernate-key</literal>, <literal>handle-lid-switch</literal>),
+ are always honored, irrespective of this setting.</para>
+
+ <para>These settings take boolean arguments. If <literal>no</literal>, the
+ inhibitor locks taken by applications are respected. If <literal>yes</literal>,
+ "shutdown", "sleep", and "idle" inhibitor locks are ignored.
<varname>PowerKeyIgnoreInhibited=</varname>,
- <varname>SuspendKeyIgnoreInhibited=</varname> and
- <varname>HibernateKeyIgnoreInhibited=</varname> default to
- <literal>no</literal>.
- <varname>LidSwitchIgnoreInhibited=</varname> defaults to
- <literal>yes</literal>. This means that the lid switch does
- not respect suspend blockers by default, but the power and
- sleep keys do. </para></listitem>
+ <varname>SuspendKeyIgnoreInhibited=</varname>, and
+ <varname>HibernateKeyIgnoreInhibited=</varname> default to <literal>no</literal>.
+ <varname>LidSwitchIgnoreInhibited=</varname> defaults to <literal>yes</literal>.
+ This means that when <command>systemd-logind</command> is handling events by
+ itself (no low level inhibitor locks are taken by another application), the lid
+ switch does not respect suspend blockers by default, but the power and sleep keys
+ do.</para></listitem>
</varlistentry>
<varlistentry>
<listitem><para>Sets the maximum number of OS tasks each user may run concurrently. This controls the
<varname>TasksMax=</varname> setting of the per-user slice unit, see
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>
- for details. Defaults to 33%, which equals 10813 with the kernel's defaults on the host, but might be smaller
- in OS containers.</para></listitem>
+ for details. If assigned the special value <literal>infinity</literal>, no tasks limit is applied.
+ Defaults to 33%, which equals 10813 with the kernel's defaults on the host, but might be smaller in
+ OS containers.</para></listitem>
</varlistentry>
<varlistentry>
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