Man1 - gtf.1

gtf - calculate VESA GTF mode lines

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

Gtf is 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.

-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).

xorg.conf(5), cvt(1)

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.