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.

   -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.




   Keith Packard, Open Source Technology Center, Intel Corporation.


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