xbacklight − adjust backlight brightness using RandR extension
xbacklight [−help] [−display display] [−get] [−set percent] [−inc percent] [−dec percent]
Xbacklight is used to adjust the backlight brightness where supported. It finds all outputs on the X server supporting backlight brightness control and changes them all in the same way.
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−get |
Print out the current backlight brightness of each output with such a control. The brightness is represented as a percentage of the maximum brightness supported. |
−set percent
Sets each backlight brightness to the specified level.
−inc percent
Increases brightness by the specified amount.
−dec percent
Decreases brightness by the specified amount.
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−help |
Print out a summary of the usage and exit. |
−version
Print out the program version and exit.
−time milliseconds
Length of time to spend fading the backlight between old and new value. Default is 200.
−steps number
Number of steps to take while fading. Default is 20.
Xrandr(3)
Keith Packard, Open Source Technology Center, Intel Corporation.