[mythtv-users] Vizio LCD native resolution problem over DVI->HDMI

Scott Alfter mythtv at salfter.dyndns.org
Wed May 14 03:01:30 UTC 2008


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David Brieck Jr. wrote:
| I'm pretty sure all HDTVs are this way. HDMI will give you overscan
| and VGA won't. It's nothing to ditch HDMI for though, just adjust the
| mythtv GUI size and positioning until it fits properly on your set.

Given that HDMI is just a superset of DVI, why should this be the case?  I have
an LCD TV with a DVI input (a Vizio L30, as it happens), and it doesn't do
overscan on the DVI input (don't think it does overscan on VGA either, but I
rarely use that input).  Setting it up to run at its native resolution
(1280x768) was easy.  I briefly had a different LCD that had only offered VGA
input (no DVI or HDMI), and it insisted on doing overscan...it went back to the
store a few days later.

Image quality (especially for graphics) on LCDs is pretty crappy when you don't
have a 1:1 mapping between pixels in the video card and pixels in the display.
~ As desirable as the lack of analog distortion in a DVI or HDMI signal may be,
if a TV forces overscan on you to use it, I'd consider that a deal-breaker.
Lack of overscan on the VGA input may make up for it, but if it insists on
doing overscan on both VGA and DVI/HDMI, I'd consider it defective and would
trade it in for a better model.

~   _/_
~  / v \ Scott Alfter (remove the obvious to send mail)
~ (IIGS( http://alfter.us/          Top-posting!
~  \_^_/ rm -rf /bin/laden          >What's the most annoying thing on Usenet?

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