Bug#899066: cvt does not support reduced blanking for refresh rates below 60Hz

To: "submit@bugs.debian.org" <submit@bugs.debian.org>
Subject: Bug#899066: cvt does not support reduced blanking for refresh rates below 60Hz
From: Jan Michael Greiner <jan0michael@yahoo.com>
Date: Fri, 18 May 2018 19:35:59 +0000 (UTC)
Message-id: <[🔎] 555235832.2831961.1526672159738@mail.yahoo.com>
Reply-to: Jan Michael Greiner <jan0michael@yahoo.com>, 899066@bugs.debian.org

Package: xserver-xorg-core
Version: 2:1.19.2-1+deb9u2

$ cvt -r 3840 2160 24

ERROR: Multiple of 60Hz refresh rate required for  reduced blanking.



This cvt version creates a working modeline 3840x2160_24.00_rb:

http://www.riscosports.co.uk/cvt.zip

Details can be found here:
https://superuser.com/a/1323969/906468

Nowadays TFT displays don't seem to require multiples of 60Hz for reduced blanking, so cvt should support this.

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