[MAN] systemd-backlight@

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SYSTEMD-BACKLIGHT@.SERVICE

Section: systemd-backlight@.service (8)
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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

/lib/systemd/systemd-backlight  

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)

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Index

NAME

SYNOPSIS

DESCRIPTION

KERNEL COMMAND LINE

SEE ALSO

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Time: 04:46:01 GMT, September 16, 2022