BRIGHTNESSCTL(1)

NAME
brightnessctl - read and control device brightness

SYNOPSIS

brightnessctl [options] [operation] [value...]

OPTIONS

-h, --help
    Print this help.

-l, --list
    List devices with available brightness controls.

-q, --quiet
    Suppress output.

-p, --pretend
    Do not perform write operations.

-m, --machine-readable
    Produce machine-readable output.

-P, --percentage
    Display value as a percentage in get.

-n, --min-value=[VALUE]
    Set minimum brightness when using delta values. VALUE is set to 1 when not provided.

-e, --exponent=K
    Changes percentage scaling curve to exponential (linear by default). Default exponent is 4. Percentage equation: % = [VALUE]^[K] * [MAX] * 100^-[K]. The exponential curve may make the adjustments perceptually equal.

-s, --save
    Save state in a temporary file.

-r, --restore
    Restore previously-saved state.

-d, --device=DEVICE
    Specify device name (can be a wildcard). If device is specified as '*', only brightness class devices are selected.

-c, --class=CLASS
    Specify device class.

-V, --version
    Print version and exit.

OPERATIONS

i, info
    Get device info.

g, get
    Get the current brightness of the device.

m, max
    Get the maximum brightness of the device.

s, set VALUE
    Set the brightness of the device.

  VALUES

You may specify VALUE for the set command in absolute or relative form, and as a value or a delta from the current value. For example:

brightnessctl set 500
    Sets brightness to 500.

brightnessctl set 50%
    Sets brightness to 50% of the maximum.

brightnessctl set 50-
    Subtracts 50 from the current brightness.

brightnessctl set +10
    Adds 10 to the current brightness.

brightnessctl set 50%-
    Subtracts 50% of the maximum from the current brightness.

brightnessctl set +10%
    Adds 10% of the maximum to the current brightness.

AUTHORS

Maintained by Mykyta Holubakha, who is assisted by other open source contributors. For more information about brightnessctl development, visit:

https://github.com/Hummer12007/brightnessctl