HDMI Audio not detected

I'm posting this in case someone else has the same problem as I did.  I wasn't able to fix it but I did find a workaround in my case that may shed some light on other people with the same problem.

I got a Yamaha soundbar for Christmas but have been unable to get Windows 7 to output the 5.1 audio to it.

Here's my hardware

• WIndows 7 PC with an i3 processor and Intel HD Graphics 4000.
• Panasonic TC-P55GT50 50 inch plasma display
• Yamaha YSP-2200 soundbar.

This is how I have it plugged together.

• HDMI output from the PC directly into HDMI3 on the TV.
• Audio out from the TV to the soundbar via the optical cable.

The problem is that the only output device that's "plugged in" according to the device manager is the PanasonicTV0. The Panasonic TV works with HDMI port but it's limited to two speaker output.  When I watch movies on it, the voices are muddled. It sounds like you're listening to the dialog at the end of a long tunnel.

I tried everything I could think of to enable 5.1 surround sound through the HDMI port. I updated my bios, and installed ALL the latest drivers, installed all Microsoft Service patches.  Nothing worked.

I even tried to install an ATI video card but for some reason adding that card kept my system from even booting up.

None of the steps I followed on this thread helped.  Remember, I was getting sound through the HDMI port via the PanasonicTV device but I couldn't enable the High Definitoin HDMI device becuase it was disabled.

My workaround was to plug the PC into the HDMI input on the soundbar and plug the TV input into the HTMI output of the soundbar.  When I did that, I got a second "PanasonicTV0" device but this time the multi-speaker options were available.

So here's the summary;

PC -> HDMI Adapter  -> TV  HDMI3 input --> TV Optical Out -> Yamaha Soundbar Optical in is limited to  2 channel sound.

PC -> HDMI Adapter -> Yamaha Soundbar HDMI In -> Yamaha HDMI out -> TV HDMI3  input has access to the full multi-speaker settings.

What does this mean?  It means that the PC can't negotiate with the soundbar correctly if it's going through the Panasonic TV.  When it goes directly to the soundbar and then to the TV it all works correctly. It's probably something with the HDMI handshake. It could be a problem in Windows or even on the Panasonic TV.  Wherever the problem lies, it's been a big PITA.

Anyway, maybe this will help someone at Microsoft diagnose the problem (doubtful) or maybe it will help someone else with a work around.

****SOLVED****

Went through the same issue and hassle and wasted 2 hours trying to figure it out...

Install the below (i know there is a newer version available, but this is what worked for me):

https://downloadcenter.intel.com/Detail\_Desc.aspx?agr=Y&DwnldID=23339&lang=eng&OSVersion=Windows%208.1%2C%2064-bit\*&DownloadType=Drivers

1. Make sure you are ONLY connected to your main display (monitor..etc)
2. Remove the HDMI cable (the one with the issue)
3. Install PROPERLY and close unnecessary programs
4. RESTART after installation

Following all the above made it work for me. Hope it helps (-_-)b

Keep in mind the Realtek Digital Output High Definition Audio requires a special cable that goes from the Red and purple connectors to your sound card.  Just use the AMD one.

I did this but HDMI isnt showing up still. I do have "Show Disabled Devices" and "Show Disconnected Devices" selected.