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Panasonic TH-50PX60U and 1366 x 768 output resolution from HTPC

post #1 of 12
5/21/07 at 11:19pm
Thread Starter 
Just recently built a HTPC with a GeForce 7900 GS card. I've hooked up my Panasonic TH-50PX60U plasma to HTPC via DVI-to-HDMI adapter. I get the standard 1280x720 resolution, but I can't get the native 1366x768 to display. I've tried the Powerstrip app with no luck.

Is there a way to get 1366 x 768 to display on this HDTV?


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Windows Vista Premium
ABIT AW9D-MAX mb
Core 2 Duo E6300
Buffalo Firestix 512MBx2 RAM (1 GB)
Vbox Cat's Eye DTA-150 ATSC Tuner
BFG Nvidia GeForce 7900 GS card w/DVI
Panasonic TH-50PX60U HDTV
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post #2 of 12
5/22/07 at 12:21am
No. You need to have a plasma that has either VGA or DVI to get 1366x768 (native res). HDMI is a subset of DVI and will only take in those HDTV resolutions, 720p or 1080i.

The TH-50PX600U (with VGA) or the commercial Panasonics (VGA or DVI board) will take 1366x768.
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post #3 of 12
5/22/07 at 6:34am
Thread Starter 
Ugh, here comes that sinking feeling. I do appreciate the reply, though.

So for me to use the setup listed, is there essentially no workaround to output a clean HDTV signal from my HTPC that is on par with just connecting the antenna straight to my Panasonic plasma?
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post #4 of 12
5/22/07 at 7:05am
There are some TV's that DO accept native res over HDMI, even though they don't have to. I get perfect 1024x768 over DVI->HDMI on my 42" panasonic plasma.
I do believe though that some of the 50" panny's don't support it over HDMI, so thats probably why you're not getting it.
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post #5 of 12
5/22/07 at 8:22pm
Thread Starter 
Am I right to assume this doesn't change/improve if I use the S-Video/component adapter and component cables to connect the htpc to the plasma?

If I'm beating a dead horse, let me know. I've found that asking the right question isn't easy when talking HDTV and HTPC.
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post #6 of 12
5/23/07 at 12:49am
Is there anything wrong with the 1280x720 resolution? Because that's basically the resolution you're getting via the antenna for 720p broadcasts. Movies should look fine.

Games should be okay, but might have jaggies and blurry text. You will probably not want to use it for word processing, spread sheet, or web page viewing, because text will be not so smooth.

With your current setup, the DVI->HDMI is your best option. Anything else will degrade the quality.

Looking at the manual for your plasma, page 42. You can try to send a 1080i signal, don't know if your video card can do that, or a 1080p which is 1920x1080. And pick the one that seems the clearest to you.
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post #7 of 12
5/23/07 at 1:52am
I am not sure if your tv has an option for optional boards, but if they do you can try the Panasonic TY42TM6D DVI Blade. I am using one right now at 1366x768, but mine is a commercial model though.

Good luck with it.
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post #8 of 12
5/23/07 at 9:33pm
Quote:
Originally Posted by Fuz View Post

I am not sure if your tv has an option for optional boards, but if they do you can try the Panasonic TY42TM6D DVI Blade. I am using one right now at 1366x768, but mine is a commercial model though.

Good luck with it.

That's not possible - computer video cards do multiples of 8, of which 1366 is not a product (do the division - you wind up with 170.75). 1360 x 768 is the correct resolution, you'll be 3 pixels short on each side of the display. I'm driving a 50PX60U at 1360x768 over component using the supplied dongle with my older 6600GT card. It doesn't really look any better than feeding it 1280x768 and letting the panel scale up to native resolution however.
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post #9 of 12
5/23/07 at 11:57pm
It is possible, I am doing it right now.

Modern display cards can do 1366. It also depends on your displays EDID. If you use a utility called moninfo and run that with a display device plugged via hdmi or dvi, it will tell you what resolutions your device supports. On mine 1366x768 is the recommended res.
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post #10 of 12
5/24/07 at 2:48am
Yup... Most modern cards, 1 to 2 years old, can do non-multiple of 8 via DVI, some via VGA. I'm surprised this cheapo SIS HTPC I built with onboard video can output 1366x768 via VGA.
LL
LL
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post #11 of 12
5/24/07 at 6:21am
Thread Starter 
Quote:
Originally Posted by SleepyBum View Post

Is there anything wrong with the 1280x720 resolution? Because that's basically the resolution you're getting via the antenna for 720p broadcasts. Movies should look fine.

Games should be okay, but might have jaggies and blurry text. You will probably not want to use it for word processing, spread sheet, or web page viewing, because text will be not so smooth.

With your current setup, the DVI->HDMI is your best option. Anything else will degrade the quality.

Looking at the *URL* manual for your plasma, page 42. You can try to send a 1080i signal, don't know if your video card can do that, or a 1080p which is 1920x1080. And pick the one that seems the clearest to you.

I guess the only thing wrong with 1280x720 is what you mention... some jaggies and text that isn't crystal clear. After giving it a day and coming back to it, the OTA HDTV is decent, just not outstanding. There is some pixelation, floating colors, etc... I guess I was assuming I would be able to calibrate the HTPC to be equivalent to the signal straight from the antenna.

I've previously poured over the manual, page 42 included. I didn't fully appreciate the rigidity of the input specs.

So is it even worth trying to jump through hoops to try to force a 1366x768 output with this TV to see if it is accepted? I've read a few posts where people say they've done it, but now I'm not sure if those posts were accurate.

Just trying to get the best possible picture for HDTV.
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post #12 of 12
5/25/07 at 4:51pm
Quote:
Originally Posted by SleepyBum View Post

Yup... Most modern cards, 1 to 2 years old, can do non-multiple of 8 via DVI, some via VGA. I'm surprised this cheapo SIS HTPC I built with onboard video can output 1366x768 via VGA.

Nice! Might be time to think about DVI -> HDMI into the plasma then...
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