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HDMI Audio - HD 530 -- Big Sur. - HELP

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I'll explain the situation well: I had installed high sierra and everything worked fine, including the hdmi audio. The monitor was detected without problems. I used Clover.
Then I decided to give big sur a try as I took the nvidia off.

Since I used opencore it hasn't worked anymore.

Last night I decided to restore the backup with High Sierra and reinstalled Clover. Well, even with clover it doesn't work anymore.

I can't understand what I'm doing wrong. I attach all the files that may be useful to understand what not.

In your Clover config.plist, you fixed HPET. Did you do the same in OpenCore?
 
I don't know, now i'm using High Sierra without problems.
The problem with hdmi audio was the setting in bios: IGPU = 64mb it was reset to 32mb. I should have put 64.
 
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