BRIGHTNESSCTL(1)                 brightnessctl                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.


       -n, --min-value=VALUE
           Set minimum brightness when using delta values, defaults to 1.


       -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).


       -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

brightnessctl                    24th Jan 2018                BRIGHTNESSCTL(1)