GTF(1)                               General Commands Manual                               GTF(1)

NAME
       gtf - calculate VESA GTF mode lines

SYNOPSIS
       gtf h-resolution v-resolution refresh [-v|--verbose] [-f|--fbmode] [-x|--xorgmode]

DESCRIPTION
       Gtf  is a utility for calculating VESA GTF modes.  Given the desired horizontal and verti‐
       cal resolutions and refresh rate (in Hz), the parameters for a matching VESA GTF mode  are
       printed  out.   Two  output  formats  are  supported:  mode  lines  suitable  for the Xorg
       xorg.conf(5) file, and mode parameters suitable for the Linux fbset(8) utility.

OPTIONS
       -v|--verbose
               Enable verbose printouts  This shows a trace for each step of the computation.

       -x|--xorgmode
               Print the mode parameters as Xorg-style mode lines.  This is the default format.

       -f|--fbset
               Print the mode parameters in a format suitable for fbset(8).

SEE ALSO
       xorg.conf(5), cvt(1)

AUTHOR
       Andy Ritger.

       This program is based on the Generalized Timing Formula (GTF(TM)) Standard  Version:  1.0,
       Revision:  1.0.   The GTF Excel(TM) spreadsheet, a sample (and the definitive) implementa‐
       tion of the GTF Timing Standard is available at <ftp://ftp.vesa.org/pub/GTF/VTF_V1R1.xls>.

X Version 11                            xorg-server 1.19.2                                 GTF(1)

usage: gtf x y refresh [-v|--verbose] [-f|--fbmode] [-x|--xorgmode]

            x : the desired horizontal resolution (required)
            y : the desired vertical resolution (required)
      refresh : the desired refresh rate (required)
 -v|--verbose : enable verbose printouts (traces each step of the computation)
  -f|--fbmode : output an fbset(8)-style mode description
 -x|--xorgmode : output an Xorg-style mode description (this is the default
                if no mode description is requested)