xbrightness man page on DragonFly

xbrightness man page on DragonFly

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xbrightness(1)							xbrightness(1)

NAME
       xbrightness - Adjust a monitor's brightness for XFree86

SYNOPSIS
       xbrightness BRIGHTNESS [ GAMMA ]

DESCRIPTION
       xbrightness  sets the overall brightness of a monitor via the XFree86 X
       server video mode extension (XFree86-VidModeExtension).

       It uses the new XF86VidModeSetGammaRamp function, which provides a more
       flexible control than the old XF86VidModeSetGamma.  The latter function
       cannot change the endpoints of the gamma curve,	only  the  middle,  so
       full  brightness	 remains  full	brightness  no	matter how you set the
       gamma.

ARGUMENTS
       BRIGHTNESS
	       A number from 0 to 65535, where 0 means complete darkness,  and
	       65535 means normal functioning - full brightness.

       GAMMA   A  float number from 0.0 to 10.0, which gives the exponent used
	       for building the gamma ramp. The default is 1.0 (linear).

ENVIRONMENT
       DISPLAY To get default host and display number.

BUGS
       Does not have
	       display or screen arguments - set these via DISPLAY environment
	       variable if necessary.

       Does not query brightness, only sets it.

       Does not play well with xgamma - xbrightness will erase xgamma's
	       settings and vice versa.

SEE ALSO
       xgamma(1)

AUTHORS
       Asher Blum <asher@wildspark.com>

       Jean-Daniel Pauget <jdp@disjunkt.com>

HISTORY
       Written	in  January  2003 to use the recently added XF86VidModeSetGam‐
       maRamp function as an overall brightness control.

       Additions in September 2005 in order to get some revival from a shifted
       LCD screen.

LINKS
       http://wildspark.com/xbrightness/

       http://disjunkt.com/xbrightness/

0.3				    Version			xbrightness(1)

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