[mythtv-users] Re: Mythtv, nvidia and DVI mystery

[Neil]

Brad Templeton writes: 

> On Fri, Mar 04, 2005 at 06:27:20AM -0600, Neil wrote:
>> Hey guys, I've done some testing regarding the mystery I'm experiencing 
>> with mythtv, nvidia and DVI.  
>> 
>> Check it out at  
>> 
>> http://restricted.dyndns.org/mystery.html  
>> 
>> comments are greatly appreciated...........  
>> 
> 
> So I guess what we're getting is that on the newer 6600 class cards,
> DVI at 1080i works without the interlace bug.  I think we heard that
> from somebody else. 
> 
> By "tearing" do you mean interlace artifacts?   The whole point of
> running at 1080i on a TV whose native resolution is 1280x720 is to
> get rid of those.  Perhaps overscan is doing you in?

It's totally different from interlace artifacts. Here is an example of how I 
am understanding on what you meant by interlaced artifacts - 
http://neuron2.net/LVG/inthead.jpg Please correct me if I am wrong. 

If so, then, it's different. I only see mine in just 1 line but random Y 
coordinates. It only happens on very fast moving objects. Here is an 
example. Like in the program American Idol, I don't know if you have that 
program. During a presentation of a performer, behind her is a large flat 
screen with fast moving randmon graphics. That's the time I will see the 
tearing however, the performer object doesn't get affected. In interlace, 
everything get's affected. So, like what I read in the other thread, 
Twinview configuration really affects playback performance. I watched the 
same recorded program but using single head xorg.conf in my computer 
monitor, and that tearing went away. That tearing though was also visible in 
my computer monitor when I was using Twinview configuration. 

Overscan? I guess, overscan only has something to do with picture being 
larger than my hdtv. Fortunately, mythfrontend comes with X&Y offsets, size 
that we can tweak. And with that, I am able to size my watching to almost 
99% of my hdtv screen.