Provided by: xgamma_1.0.1-0ubuntu2_i386 bug
 

NAME

        xgamma - Alter a monitor’s gamma correction through the X server
 

SYNOPSIS

        xgamma  [-display  display]  [-screen  screen]  [-quiet]  [-gamma f.f |
        [[-rgamma f.f] [-ggamma f.f] [-bgamma f.f]]]
 

DESCRIPTION

        xgamma allows X users to query and alter the gamma correction of a mon‐
        itor via the X video mode extension (XFree86-VidModeExtension).
 

OPTIONS

        -display display
                This  argument  allows you to specify the server to connect to;
                see X(7).
 
        -screen screen
                When multiple displays are configured as a single logical  dis‐
                play,  this  option allows you to select the screen you wish to
                change.
 
        -quiet  Silence the normal output of xgamma
 
        -help   Print out the ‘Usage:’ command syntax summary.
 
        -gamma f.f
                The gamma correction can either be defined as a  single  value,
                or  separately  for  the  red,  green and blue components. This
                argument specifies the gamma correction as a single  value.  If
                no  value  for the gamma correction is given xgamma returns the
                current gamma correction of the display.
 
        -rgamma f.f
                This argument specifies the red component of the gamma  correc‐
                tion.
 
        -ggamma f.f
                This  argument  specifies the green component of the gamma cor‐
                rection.
 
        -bgamma f.f
                This argument specifies the blue component of the gamma correc‐
                tion.
 

ENVIRONMENT

        DISPLAY To get default host and display number.
 

BUGS

        This client changes the internal values of the gamma correction for the
        Xserver. Whether or not these values are respected depends on the video
        drivers.
 
        The  gamma  values  are  passed to the Xserver with 3 decimal places of
        accuracy.
        xvidtune(1)
 

AUTHORS

        Kaleb S. Keithley, X Consortium.
        David Dawes, David Bateman