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XBACKLIGHT(1) FreeBSD General Commands Manual XBACKLIGHT(1)
NAME xbacklight - adjust backlight brightness using RandR extension
SYNOPSIS xbacklight [-help] [-display display] [-get] [-set percent] [-inc percent] [-dec percent]
DESCRIPTION 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.
-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.
-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.
SEE ALSO Xrandr(3)
AUTHORS Keith Packard, Open Source Technology Center, Intel Corporation.
X Version 11 xbacklight 1.2.3 XBACKLIGHT(1)