<!--*-nxml-*-->
<!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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- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
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+ SPDX-License-Identifier: LGPL-2.1+
-->
<refentry id="systemd-backlight@.service" conditional='ENABLE_BACKLIGHT'>
<refentryinfo>
<title>systemd-backlight@.service</title>
<productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Lennart</firstname>
- <surname>Poettering</surname>
- <email>lennart@poettering.net</email>
- </author>
- </authorgroup>
</refentryinfo>
<refmeta>
that restores the display backlight brightness at early boot and
saves it at shutdown. On disk, the backlight brightness is stored
in <filename>/var/lib/systemd/backlight/</filename>. During
- loading, if udev property <option>ID_BACKLIGHT_CLAMP</option> is
- not set to false value, the brightness is clamped to a value of at
+ loading, if the udev property <option>ID_BACKLIGHT_CLAMP</option> is
+ not set to false, the brightness is clamped to a value of at
least 1 or 5% of maximum brightness, whichever is greater. This
restriction will be removed when the kernel allows user space to
reliably set a brightness value which does not turn off the