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My system:

  • Windows 11 23H2
  • Nvidia 3080 FE
  • Denon AVR-S960H receiver connected to HDMI output from vid card

I used all of this hardware before with Win 10 for years with no issues. I installed Win 11 a few weeks ago, and for a while it was working fine. But then the HDMI audio started getting flaky. Now, I cannot even get the receiver to show up in the list of Windows audio devices. Nvidia is aware of the device:

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Windows is aware of the device too:

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And Windows still puts out video to the device. But no longer audio:

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I've done many searches and tried many things. Reinstalled video drivers. Updated video drivers, straight from Nvidia. Disabled every bit of onboard video/audio I can find (USB audio, Realtek, etc) directly in BIOS (in an attempt to resolve potential conflict with Nvidia HDMI output). Restarted Windows services related to audio. Deleting/reinstalling any video/audio related hardware in device manager. I am fully stumped. Bluetooth audio devices still work fine.

Any ideas? More data from device manager (hidden entries shown) if it helps:

enter image description here

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