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KracsNZ
57 posts

Master Geek


  #200535 11-Mar-2009 09:15
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This is strange.

Last night I ran a DVI-HDMI cable from my wife's PC to our bedroom TV (Panasonic Viera 32" 1366x768). Adding the HDTV resolution 720p50 under HDTV support in CCC it worked immediately with no sizing issues and in correct aspect ratio (1 to 1 pixel mapping).

You might want to choose 720p50 (PAL or 60 NTSC) in CCC, and then look at setting in your TV. Had a quick look at the manual for your TV, stupid thing doesn't explain much about the Settings area. Anyway, try bringing up the TVs on screen display, go to the Settings area and look at the Wide modes and the H/V position.

Not sure if the Wide option will work on HDMI inputs, and you shouldn't really have to alter the H/V postion on a digital input but /shrug, running out of things to try. Just a note, mucking around with the sizings in H/V Postion section may cause you to lose resolution as it would no longer be a true 1 to 1 pixel mapping.

If worst comes to worst, you could try a factory reset on the TV, last option in the Settings area. Though you'll have to re-setup all your inputs and channels etc...

I did notice allot of Radeon users having problems with LCD TVs on google, not many had working solutions either :/. Didn't see any having problems with the 4x00, though quite a few with 3x00.

RunAway

37 posts

Geek


  #200560 11-Mar-2009 10:31
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KracsNZ: This is strange.

Last night I ran a DVI-HDMI cable from my wife's PC to our bedroom TV (Panasonic Viera 32" 1366x768). Adding the HDTV resolution 720p50 under HDTV support in CCC it worked immediately with no sizing issues and in correct aspect ratio (1 to 1 pixel mapping).

You might want to choose 720p50 (PAL or 60 NTSC) in CCC, and then look at setting in your TV. Had a quick look at the manual for your TV, stupid thing doesn't explain much about the Settings area. Anyway, try bringing up the TVs on screen display, go to the Settings area and look at the Wide modes and the H/V position.

Not sure if the Wide option will work on HDMI inputs, and you shouldn't really have to alter the H/V postion on a digital input but /shrug, running out of things to try. Just a note, mucking around with the sizings in H/V Postion section may cause you to lose resolution as it would no longer be a true 1 to 1 pixel mapping.

If worst comes to worst, you could try a factory reset on the TV, last option in the Settings area. Though you'll have to re-setup all your inputs and channels etc...

I did notice allot of Radeon users having problems with LCD TVs on google, not many had working solutions either :/. Didn't see any having problems with the 4x00, though quite a few with 3x00.


Ok thanks...I already tried all the wide mode settings and everything you can think of on this TV...Will try the 720p50...I also have a 32"(Olivia) on another computer (with this exact same card!) that works perfectly!!! I have also set it up with another card B-4 I upgraded to the one I use now (I have two HTPC with exact same card) I don't know why I am having so much trouble with this 37" TV..The reason I got the exact same card for the 37" is I had good results with the 32",which is the first HTPC I built...Why change if it worked so easily...I am closer than I have been so far...Used the overscan to get it close but the font is still kinda off; looks kinda like old fashion printing press stuff,if that makes sence...Kinda like the print ink is thick in some areas of the letters...

 
 
 
 


scottjpalmer
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  #200561 11-Mar-2009 10:40
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sbiddle may have missed this thread, I suggest you PM him.

He can be easily bribed to provide support for a box of beer ;-)

KracsNZ
57 posts

Master Geek


  #200563 11-Mar-2009 10:45
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Yeah, that's usually the result on a non-1 to 1 pixel mapping. i.e. something (maybe at the TV end) is scaling the image causing aliasing issues on the fonts.

Just curious, have you tried setting your Radeon to 1280x720 resolution yet? That's the official 720p 16:9 resolution? In truth I expect this to look blurry as your screen may resize it to 1366x768. Who knows, maybe you'll be lucky and it'll do a 1 to 1 pixel mapping at that res... yes I'm just guessing know :)

RunAway

37 posts

Geek


  #200565 11-Mar-2009 10:57
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KracsNZ: Yeah, that's usually the result on a non-1 to 1 pixel mapping. i.e. something (maybe at the TV end) is scaling the image causing aliasing issues on the fonts.

Just curious, have you tried setting your Radeon to 1280x720 resolution yet? That's the official 720p 16:9 resolution? In truth I expect this to look blurry as your screen may resize it to 1366x768. Who knows, maybe you'll be lucky and it'll do a 1 to 1 pixel mapping at that res... yes I'm just guessing know :)



1280x720 is what it keeps reverting  to and actually thats the setting I was talking about where I get my best results....What now?

RunAway

37 posts

Geek


  #200568 11-Mar-2009 10:58
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scottjpalmer: sbiddle may have missed this thread, I suggest you PM him.



He can be easily bribed to provide support for a box of beer ;-)


Thanks...Just did that..Maybe he will chime in and help me and KracsNZ....

RunAway

37 posts

Geek


  #200573 11-Mar-2009 11:20
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When I connect  with the RGB\VGA connection it does good at 1366x768. That has to be the TV doing that...Wonder why it wont do it with  HDMI?

 
 
 
 


Nety
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  #200576 11-Mar-2009 11:29
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RunAway:
1280x720 is what it keeps reverting  to and actually thats the setting I was talking about where I get my best results....What now?


Have you run the tests for 1:1 pixel mapping?

http://tft.vanity.dk/

That will tell you straight away if it is 1:1. On my setup the desktop and media centre software are 1:1 but the desktop has overscan so I loose the bottom of the start bar etc.







Media centre PC - Case Silverstone LC16M with 2 X 80mm AcoustiFan DustPROOF, MOBO Gigabyte MA785GT-UD3H, CPU AMD X2 240 under volted, RAM 4 Gig DDR3 1033, HDD 120Gig System/512Gig data, Tuners 2 X Hauppauge HVR-3000, 1 X HVR-2200, Video Palit GT 220, Sound Realtek 886A HD (onboard), Optical LiteOn DH-401S Blue-ray using TotalMedia Theatre Power Corsair VX Series, 450W ATX PSU OS Windows 7 x64

RunAway

37 posts

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  #200584 11-Mar-2009 12:27
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Nety:
RunAway:
1280x720 is what it keeps reverting  to and actually thats the setting I was talking about where I get my best results....What now?


Have you run the tests for 1:1 pixel mapping?

http://tft.vanity.dk/

That will tell you straight away if it is 1:1. On my setup the desktop and media centre software are 1:1 but the desktop has overscan so I loose the bottom of the start bar etc.


Will try this right now...Thanks..

RunAway

37 posts

Geek


  #200591 11-Mar-2009 12:57
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RunAway:
Nety:
RunAway:
1280x720 is what it keeps reverting  to and actually thats the setting I was talking about where I get my best results....What now?


Have you run the tests for 1:1 pixel mapping?

http://tft.vanity.dk/

That will tell you straight away if it is 1:1. On my setup the desktop and media centre software are 1:1 but the desktop has overscan so I loose the bottom of the start bar etc.


Will try this right now...Thanks..

 
Not sure if I know how this works..Actually I know I don't...Sorry Im so dumb...

RunAway

37 posts

Geek


  #200604 11-Mar-2009 13:38
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I have a pretty good photo I took of the screen shot here
http://www.flickr.com/photos/36220987@N04/?saved=1

  Does this look like 1:1 pixel mapping?

RunAway

37 posts

Geek


  #200613 11-Mar-2009 14:15
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What does it mean for me if its not 1:1?

KracsNZ
57 posts

Master Geek


  #200618 11-Mar-2009 14:36
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RunAway: What does it mean for me if its not 1:1?


No, that looks very bad. If you open that test pattern on a computer monitor you'll see its literally just alternate black and white dots.

It should be uniformed (almost 1 tone grey looking at a distance) across the entire screen. Those light patterns you're getting means it's not doing 1:1 pixel mapping which means the pixels are getting aliased together.

If you're not getting 1:1 pixel mapping it usually means you're losing fidelity (resolution / clarity) in the image. i.e. the image may look slightly blurry, areas of the screen may look sharper that others (espeacially text) etc...

You could try changing resolution in CCC and see if one of them gives you a nice uniformed look. If you get close enough to the screen you should be able to see the individual black/white dots. If you can't find one, it may mean either your graphics card can't produce the native resolution of the screen properly or your TV doesn't have any mode that does true 1:1 pixel mapping.

KracsNZ
57 posts

Master Geek


  #200623 11-Mar-2009 14:56
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Sadly RunAway, this may be a problem with HDMI input on the Visio.

Here's a quote from TomsHardware

Using the VGA PC Input, the GV42L was able to achieve 1:1 pixel mapping by scaling from 1360x768, which is a common computer resolution, to its native resolution of 1366x768. The HDMI input did not behave as well, and I was unable to get 1:1 pixel mapping. The VGA input looked fantastic, however, and I was able to use the GV42L as a monitor for long periods of time with no eye strain. You can sit slightly closer than seven to eight feet when using the GV42L as a monitor. Websites, word processing, photos and movie clips look great with accurate color and fantastic detail.

RunAway

37 posts

Geek


  #200625 11-Mar-2009 15:00
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KracsNZ:
RunAway: What does it mean for me if its not 1:1?


No, that looks very bad. If you open that test pattern on a computer monitor you'll see its literally just alternate black and white dots.

It should be uniformed (almost 1 tone grey looking at a distance) across the entire screen. Those light patterns you're getting means it's not doing 1:1 pixel mapping which means the pixels are getting aliased together.

If you're not getting 1:1 pixel mapping it usually means you're losing fidelity (resolution / clarity) in the image. i.e. the image may look slightly blurry, areas of the screen may look sharper that others (espeacially text) etc...

You could try changing resolution in CCC and see if one of them gives you a nice uniformed look. If you get close enough to the screen you should be able to see the individual black/white dots. If you can't find one, it may mean either your graphics card can't produce the native resolution of the screen properly or your TV doesn't have any mode that does true 1:1 pixel mapping.


Ive decided this TV is going back to Walmart...I know the card can do it because my 32" has 1:1 and the same card in it looks great...

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