Nvidia HDMI "not Plugged In" (greyed Out), Video, But No Audio?

Sep 13, 2012

Here's my setup: Nvidia video card>HDMI out to Sony Home Theater System>HDMI out to Samsung HDTV. I use this to get 5.1 LPCM surround sound for video games. It worked fine until I did a firmware update on the Sony unit. Now, the HDMI audio is greyed out in Windows 7 audio playback options. Nvidia Control Panel sees the device as audio compatible, but Windows does not.Audio DOES work if I connect a different display (through the same system). I connected an Acer computer monitor and everything worked normally. It also works it I connect it directly to the Samsung TV. The Sony unit works on its own or with the Acer monitor connected. When the monitor is connected, Nvidia Control Panel sees the home theater system as Sony AV System and Audio Playback reports SonyAVSYSTEM. When the Samsung TV is plugged in, Nvidia CP sees the home theater system as Sony Digital Display and Windows audio just says the cable is unplugged (doesn't report anything). I'm getting picture with this setup, but I can't even select the audio option.

I'm going crazy at this point, I have Sony working on it from their end and Samsung insists it's not their fault. Is this a Windows problem? I find it strange that Nvidia CP can recognize the unit and marks it as audio-capable, but Windows says a cable is unplugged. I've tried all recent driver options for both Realtek and Nvidia (Betas and stable). All drivers work the same under different connections described above. That the system works normally unless PC>Theater>TV makes me think that this is a pretty specific breakdown in communication with HDMI!date:Sony representatives got back to me with the findings from their engineers. They insist that because my PS3 works on the setup, it must be an issue with my PC. Their best guess is that the devices are failing to handshake properly over the HDMI connection.

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I'm trying to hook up my TV with my computer, and for the most part it's working. The video goes through and I get how to control it and everything. The only thing not working is the sound.

I'm using an HDMI to HDMI cable, and like I said the video is fine. Also, when the cable is plugged into my boyfriend's laptop, the sound comes out of the TV.

So this must mean the problem is with my computer specifically. Although, this computer is only a month old, so I wouldn't think anything is out of date.

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if you need more info for example my pc setup just ask.

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