I am trying to use VGA from my linux htpc with mythtv on this display.

However, when I set the resolution to 1024X768 (the native resolution of the panel), the picture is shifted and I see black area which is not part of the picture.

Question:

1) My assumption was that with 1:1 pixel mapping (with native resolution signal), the display should not have underscan/overscan.

2) how i can achieve 1:1 pixel mapping with this display

Thanks
-M

hey music,

the 768p 42" plasma panel will not give you 1:1 mapping regardless of what inputs you use due to the rectangular pixels from the 1024x768 native resolution.

There *might* be some other resolutions you could use to fill up the screen to a 16:9 format, but you will still not get true 1:1 mapping. The pixels will not line up with the physical lines of resolutions on the display.

Basically, you are out of luck. You need a 1366 x 768 res panel or 1920 x 1080 panel and use DVI connection.


... and I get no overscan, whether I'm on desktop or in movies.

meowmeowmeomweomwoemowmowmew

thats a bummer. Thanks for the help Cheez.

Here is some interesting info:

http://forums.entechtaiwan.net/viewtopic.php?=&p=17730

and funnily enough 1366x806 resulted in perfect image and filled up the desktop with no over/underscan.

Whats the best way to verify if the pixel mapping is 1:1?

http://pixelmapping.wikispaces.com/Pixel+mapping+explained

gives a reference pattern but not sure what I should really look for.

Thanks
-M

1:1 pixel mapping means the signal from your source is exactly the resolution of your TV. So for a 1366X768 panel, you have to be outputting 1366X768 from your computer or external scaler. How does your text look on webpages with small fonts using that 1366X806? I notice if mine isn't 1:1, that text on websites like fox sports has a phase shift to it. Some text looks crisp, and some looks blurry.

exactly.............................

If it's not 1:1 mapping, like what Marky said, the texts will not look perfectly sharp across the screen from one side all the way to the other, left and right, top and bottom. With 1:1, the text is perfectly defined, crystal, crispy, clean, crunchy, umm... what else.... "sparking"... what other words should I use it... umm... anyways, it'll look dang perfect no matter where the texts are in your screen. :p

Yes, some scalers will also tell if you're running 1:1 pixel mapping or not. :)

With 1:1, the text is perfectly defined, crystal, crispy, clean, crunchy, umm... what else.... "sparking"...

:p

Ok. Thanks for the help guys. Will try it and let you know how it goes.

-M