No sound on HDMI with Windows 7 om Mac Mini 2010

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No sound on HDMI with Windows 7 om Mac Mini 2010

Hi,

i've installed bootcamp (windows 7 64 bit) on a new mac mini. When I turn on power an boot windows there's no sound over HDMI. The windows device manager says that everything is working properly.

Then I boot mac os and HDMI sound works fine in mac os. Then booting windows again HDMI sound is working in windows too. But when I turn of the mac and turn it on again booting windows sound is missing again.

Any suggestions? I updated to the latest nvidia hdmi audio driver without success.

mac mini 2010, Mac OS X (10.6.4), windows7 64 bit

Posted on Aug 17, 2010 10:47 PM

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Answer 1

dibra Author

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Aug 19, 2010 11:53 AM in response to dibra

Found a workaround: The problem is not the NVidia HDMI audio driver but the Microsoft HD audio driver / device. If you have no sound over HDMI with your Mac Mini you have to

1) Find out the hardware ID of the Microsoft HD Audio Device:
* windows device manager -> system devices -> High definition audio controller
* right mouseclick -> device properties -> Details -> select HardwareID

2) Use the devcon command line utility to disable and enable the device:

devcon disable "HardwareID"
devcon enable "HardwareID"

And you will have HDMI sound again.

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