Man page 1 : gtf

gtf - calculate VESA GTF mode lines

gtf h-resolutionv-resolutionrefresh [ -v | --verbose ] [ -f | --fbmode ] [ -x | --xorgmode ]

Gtfis a utility for calculating VESA GTF modes. Given the desired horizontal and vertical 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.

R -v | --verbose

        Enable verbose printouts This shows a trace for each step of the computation.

R -x | --xorgmode

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

R -f | --fbset

        Print the mode parameters in a format suitable for

R fbset(8) .

xorg.conf(5)

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) implementation of the GTF Timing Standard is available at <ftp://ftp.vesa.org/pub/GTF/VTF_V1R1.xls>.