{
    "mode": "man",
    "parameter": "systemd-backlight@.service",
    "section": "8",
    "url": "https://www.chedong.com/phpMan.php/man/systemd-backlight%40.service/8/json",
    "generated": "2026-06-13T08:53:50Z",
    "synopsis": "systemd-backlight@.service\n/lib/systemd/systemd-backlight save [backlight|leds]:DEVICE\n/lib/systemd/systemd-backlight load [backlight|leds]:DEVICE",
    "sections": {
        "NAME": {
            "content": "systemd-backlight@.service, systemd-backlight - Load and save the display backlight\nbrightness at boot and shutdown\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "systemd-backlight@.service\n\n/lib/systemd/systemd-backlight save [backlight|leds]:DEVICE\n\n/lib/systemd/systemd-backlight load [backlight|leds]:DEVICE\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "systemd-backlight@.service is a service that restores the display backlight brightness at\nearly boot and saves it at shutdown. On disk, the backlight brightness is stored in\n/var/lib/systemd/backlight/. During loading, if the udev property IDBACKLIGHTCLAMP is not\nset to false, the brightness is clamped to a value of at least 1 or 5% of maximum brightness,\nwhichever is greater. This restriction will be removed when the kernel allows user space to\nreliably set a brightness value which does not turn off the display.\n",
            "subsections": []
        },
        "KERNEL COMMAND LINE": {
            "content": "systemd-backlight understands the following kernel command line parameter:\n\nsystemd.restorestate=\nTakes a boolean argument. Defaults to \"1\". If \"0\", does not restore the backlight\nsettings on boot. However, settings will still be stored on shutdown.\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "systemd(1)\n\n\n\nsystemd 249                                                            SYSTEMD-BACKLIGHT@.SERVICE(8)",
            "subsections": []
        }
    },
    "summary": "systemd-backlight@.service, systemd-backlight - Load and save the display backlight brightness at boot and shutdown",
    "flags": [],
    "examples": [],
    "see_also": [
        {
            "name": "systemd",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/systemd/1/json"
        },
        {
            "name": ".SERVICE",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/.SERVICE/8/json"
        }
    ]
}