{
    "mode": "man",
    "parameter": "gtf",
    "section": "1",
    "url": "https://www.chedong.com/phpMan.php/man/gtf/1/json",
    "generated": "2026-06-15T18:52:03Z",
    "synopsis": "gtf h-resolution v-resolution refresh [-v|--verbose] [-f|--fbmode] [-x|--xorgmode]",
    "sections": {
        "NAME": {
            "content": "gtf - calculate VESA GTF mode lines\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "gtf h-resolution v-resolution refresh [-v|--verbose] [-f|--fbmode] [-x|--xorgmode]\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "Gtf  is  a utility for calculating VESA GTF modes.  Given the desired horizontal and vertical\nresolutions and refresh rate (in Hz), the parameters for a matching VESA GTF mode are printed\nout.   Two  output formats are supported: mode lines suitable for the Xorg xorg.conf(5) file,\nand mode parameters suitable for the Linux fbset(8) utility.\n\n",
            "subsections": []
        },
        "OPTIONS": {
            "content": "",
            "subsections": [
                {
                    "name": "-v --verbose",
                    "content": "Enable verbose printouts  This shows a trace for each step of the computation.\n",
                    "flag": "-v",
                    "long": "--verbose"
                },
                {
                    "name": "-x --xorgmode",
                    "content": "Print the mode parameters as Xorg-style mode lines.  This is the default format.\n",
                    "flag": "-x",
                    "long": "--xorgmode"
                },
                {
                    "name": "-f --fbset",
                    "content": "Print the mode parameters in a format suitable for fbset(8).\n",
                    "flag": "-f",
                    "long": "--fbset"
                }
            ]
        },
        "SEE ALSO": {
            "content": "xorg.conf(5), cvt(1)\n",
            "subsections": []
        },
        "AUTHOR": {
            "content": "Andy Ritger.\n\nThis program is based on the Generalized Timing Formula (GTF(TM)) Standard Version: 1.0,  Re‐\nvision:  1.0.  The GTF Excel(TM) spreadsheet, a sample (and the definitive) implementation of\nthe GTF Timing Standard is available at <ftp://ftp.vesa.org/pub/GTF/VTFV1R1.xls>.\n\n\n\nX Version 11                             xorg-server 21.1.4                                   GTF(1)",
            "subsections": []
        }
    },
    "summary": "gtf - calculate VESA GTF mode lines",
    "flags": [
        {
            "flag": "-v",
            "long": "--verbose",
            "arg": null,
            "description": "Enable verbose printouts This shows a trace for each step of the computation."
        },
        {
            "flag": "-x",
            "long": "--xorgmode",
            "arg": null,
            "description": "Print the mode parameters as Xorg-style mode lines. This is the default format."
        },
        {
            "flag": "-f",
            "long": "--fbset",
            "arg": null,
            "description": "Print the mode parameters in a format suitable for fbset(8)."
        }
    ],
    "examples": [],
    "see_also": [
        {
            "name": "xorg.conf",
            "section": "5",
            "url": "https://www.chedong.com/phpMan.php/man/xorg.conf/5/json"
        },
        {
            "name": "cvt",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/cvt/1/json"
        }
    ]
}