SYSTEMD\-BACKLIGHT@\&.SERVICE

Section: systemd-backlight@.service (8)
Updated:
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NAME

systemd-backlight@.service, systemd-backlight - Load and save the display backlight brightness at boot and shutdown  

SYNOPSIS

systemd-backlight@.service

/usr/lib/systemd/systemd-backlight save [backlight|leds]:DEVICE

/usr/lib/systemd/systemd-backlight load [backlight|leds]:DEVICE  

DESCRIPTION

systemd-backlight@.service is a service that restores the display backlight brightness at early boot and saves it at shutdown. On disk, the backlight brightness is stored in /var/lib/systemd/backlight/. During loading, if the udev property ID_BACKLIGHT_CLAMP 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 display.  

KERNEL COMMAND LINE

systemd-backlight understands the following kernel command line parameter:

systemd.restore_state=

Takes a boolean argument. Defaults to "1". If "0", does not restore the backlight settings on boot. However, settings will still be stored on shutdown.
 

SEE ALSO

systemd(1)

 

Index

NAME
SYNOPSIS
DESCRIPTION
KERNEL COMMAND LINE
SEE ALSO