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xbrightness(1)		    General Commands Manual		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)

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | ENVIRONMENT | BUGS | SEE ALSO | AUTHORS | HISTORY | LINKS

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