[mythtv-users] MythTV, 1080P, NVidia, DVI to HDMI

[Mike Perkins]

Simon Hobson wrote:
> Robert McNamara wrote:
> 
>>  > 1.  Should I return the S1 and get a panel with a VGA input because 
>> I will have less issues?
>>
>> Nah, DVI and HDMI aren't any tougher than plain jane VGA (IMHO) and
>> the gains outweigh any setup woes.
> 
> That depends on the TV and whether you are bothered by overscan. 
> AFAICT,m the default for HDMI inputs is to overscan - ie you feed the 
> screen a 1920x1080 signal, the TV chops off the edges, re-samples what's 
> left up to 1920x1080 and displays that. From what I've been able to find 
> out, it seems that larger panels are more likely to support a 1:1 mode 
> (sometimes called Full Pixel mode, or other names) - if it does then you 
> can feed the panel a 1920x1080 image and it will display it unmangled.
> 
> Since VGA inputs are designed for computer use, the default on those is 
> to NOT overscan. In that respect, VGA is easier to setup - and if the 
> display doesn't have Full Pixel mode on a digital input, will be the 
> only way to get an unmangled computer display.
> 
> What's **really** annoying to me is the way manufacturers just don't 
> give any information on this in their marketing blurb. Makes finding a 
> suitable set a hit and miss affair - ie try them till you find one that 
> works properly !
> 
Perhaps we could do with a front-end setup function which generates a test card 
to make setting up the video link easier. By driving the display with a known 
signal it should be possible to find out if it was 
overscanning/re-sampling/whatever, and possibly what modes it supports.

-- 

Mike Perkins