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Why does my HDMI connection look bad?

post #1 of 21
Thread Starter 
I have a 780g mobo, and a samsung 40" LCD that runs at 1366x768 native. I have been using VGA running at 1360x768, and the screen looked okay.

Bought a HDMI connection cable, and hooked up the TV and PC with this instead of the VGA and the picture is crud. There appears to be a lot of ghosting and shadows.

ATI Catalyst (under DVI/HDMI attributes) reports maximum resolution at 1920x1280 (why?) and under Displays manager it shows desktop area to be 1360x768, but with a refresh rate of 30i.

What is going on and how do I fix it? Did I get a bum steer on switching from VGA to HDMI?
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post #2 of 21
Sounds like you bought a bad HDMI cable.
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post #3 of 21
its a 40" tv with a low resolution i have a 52"1080 tv and it still looks like **** with HDMI
    
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nope! 
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post #4 of 21
So are you guys saying that when you run HDMI out of a HTPC, that the picture will always be bad no matter what???? Doesn't the computer scale it somehow or something? If you have a Blu-Ray player in the HTPC, is the picture going to look as good as a Blu-Ray player or worse???
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post #5 of 21
It sounds to me like you got a bad HDMI cable, how long is it? It should be shielded at anything up to 6 feet and double shielded past that. HDMI from my Gigabyte 780G board looks fantastic, using some post-processing options in ffdshow makes DVDs look even better than a regular DVD player.

Another thing to look at would be to make sure you have the Catalyst Control Centre set to HDTV mode (there should be an HDTV option heading in the left-hand menu in the advanced control panel, there are settings in there to adjust overscan, underscan, resolution, refresh rate and interlacing or progressive).
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post #6 of 21
Make sure you go in and enable the correct setting for the HD format or it will look bad. I had the same problem with a 26" HDTV and after adjusting the settings it looks fine.
post #7 of 21
Thread Starter 
Not a bad hdmi cable, unless I got two of them (I bought 2 they both are the same). The problem I think is that with HDMI, the resolutions I can choose are restricted. So even if my tv supports 1360x768 over VGA, it doesnt over HDMI.

As absurd and insane as that sounds, from what I have read that is just how it goes. I twiddled quite a lot with the control panel from catalyst, but there seemed to be no way to select 1360x768 at 60 refresh... and again (please correct me if I am wrong!) these supported resolutions over HDMI come from the TV.

Would love to be wrong though, anyone? The TV is a Samsung LN-4096D by the way.
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post #8 of 21
Your TV should have two HDMI ports. Use the second one. It should say PC HDMI.
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post #9 of 21
you sure its not a cable problem, you might have uber ****ty taiwanese budget cables.
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post #10 of 21
Why are you trying to run 1360x768 as an HD resolution? Granted, at 1920x1080 most of your icons will be small, but it will make video playback look more accurate. I'm using an HDMI cable out of my 780g at 720p, and it looks fantastic. I had to go into CCC and adjust the overscan option, but the screen looks great. Your vga and HD signals are meant to be different, and you shouldn't really be running at the vga native resolution.
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