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I have my Pioneer receiver hooked up to my AMD HD4600 which supports audio output over HDMI. I used to work fine, however, after a recent driver update, it will only output stereo sound. It used to output 5.1 surround sound perfectly.

Windows does not seem to recognize the device as capable of 5.1.

enter image description here

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In the past, 5.1 was given as an option in the configuration window, like this: enter image description here

I can not get it to properly recognize the capabilities of the device. I have tried uninstalling the relevant audio device in device manager, and I have also completely removed and reinstalled the display driver.

Any suggestions would be greatly appreciated.


share|improve this question
"after a recent driver update" - That's one of the pitfalls of updating drivers/software w/o the purpose of fixing a specific issue. The technical term is regression, the reappearance of a previously fixed bug or the loss of a feature. If the driver(s) cannot be rolled back, then what I've done is either reinstall the whole OS and inhibit the driver update(s), or live with it & just wait for another driver update with the fix. I've been burned several times by Nvidia "updates", as recnetly as 2 weeks ago in Win8. – sawdust Apr 15 '12 at 22:12
I suppose I can live with it. It just bothers me not using everything to it's full potential. – Chris A Apr 16 '12 at 1:08
In the Any suggestions catagory, many of the methods for multi channel seperations are via "licenced" technologies DTS THX Dolby etc. In some driver updates I get for my audio card, only the original disk holds the "licenced" technologies. The publicly releaced driver updates did not contain them. I assume that we are paying for these technologies when purchacing a product with them in it, and they have rules for distributions. – Psycogeek Apr 16 '12 at 2:15
That or it is just some "filter" item that got broken along the way, some "codec" thing that changed or 101 other things that can happen. – Psycogeek Apr 16 '12 at 2:23
I haven't been using the driver from the original disk for quite some time now, but good suggestion. – Chris A Apr 16 '12 at 2:38

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