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.

       -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.