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X11R7.4 - man page for xbacklight (x11r4 section 1)

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       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 out-
       puts 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

       -steps number
	      Number of steps to take while faiding. Default is 20.


       Keith Packard, Open Source Technology Center, Intel Corporation.

X Version 11				  xbacklight 1.1			    XBACKLIGHT(1)
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