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