NAME | SYNOPSIS | DESCRIPTION | KERNEL COMMAND LINE | SEE ALSO | COLOPHON |
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SYSTEMD-....SERVICE(8) [email protected] SYSTEMD-....SERVICE(8)
[email protected], systemd-backlight - Load and save the display backlight brightness at boot and shutdown
[email protected] /usr/lib/systemd/systemd-backlight save [backlight|leds]:DEVICE /usr/lib/systemd/systemd-backlight load [backlight|leds]:DEVICE
[email protected] 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. The percentage can be adjusted by specifying a percentage (needs to be suffixed with "%", e.g. "30%") to the property ID_BACKLIGHT_CLAMP.
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. Added in version 209.
systemd(1)
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[email protected]
systemd 255 SYSTEMD-....SERVICE(8)
Pages that refer to this page: kernel-command-line(7), systemd.directives(7), systemd.index(7)