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Subject: How can a TV know that an image is coming from a computer, not
From: scott@alfter.DIESPAMMERSDIE.us (Scott Alfter)
Date: 12/15/2007 4:48:01 PM
In article <13m8jp1dehh98e3@corp.supernews.com>,
Glenn Millar <usenet@glennmillar.plus.com> wrote:
>In reality, you wouldn't want to use the HDMI connection to connect a
>PC. The best results on my 50" samsung is via the VGA connector. That
>way I get full 1360x768@30hz progressive whereas 720p or 1080i is in
>actually a lesser resolution.
There's no reason you can't use the same modeline over DVI or HDMI that you
would use with VGA. On the contrary, in my experience it's been much easier
to get LCDs working on a digital connection than on an analog connection.
LCDs sold for computer use have a button on them that usually allows them to
sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1
correspondence between pixels in the framebuffer and pixels on the screen,
you then have to do extensive tinkering with modelines...and you might never
come up with a working modeline.
My TV has a native resolution of 1280x768. I generated a modeline for that
resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just
Works.
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