cvt - calculate VESA CVT mode lines
cvt [-v|--verbose] [-r|--reduced]
  h-resolution v-resolution [refresh]
Cvt is a utility for calculating VESA Coordinated Video Timing modes.
  Given the desired horizontal and vertical resolutions, a modeline adhering to
  the CVT standard is printed. This modeline can be included in Xorg
  xorg.conf(5)
  - refresh
- Provide a vertical refresh rate in Hz. The CVT standard prefers either
      50.0, 60.0, 75.0 or 85.0Hz. The default is 60.0Hz.
- -v|--verbose
- Warn verbosely when a given mode does not completely correspond with CVT
      standards.
- -r|--reduced
- Create a mode with reduced blanking. This allows for higher frequency
      signals, with a lower or equal dotclock. Not for Cathode Ray Tube based
      displays though.
    
  
Luc Verhaegen.This program is based on the Coordinated Video Timing sample
    implementation written by Graham Loveridge. This file is publicly available
    at <http://www.vesa.org/Public/CVT/CVTd6r1.xls>. CVT is a VESA
    trademark.