Please help. Big Sur HDMI Audio not working on Dell inspiron 5577 laptop

Hi Everyone,

I have got Dell inspiron 5577 with an CPU i7 7700 and intel hd graphics 630. Alc256. I have installed Big Sur using OpenCore.

Everything is working but I can’t get audio to work though HDMI. I have it installed agdpmod=vit9696 to get the hdmi working and alcid=21 for the audio in boot argument. As the built in audio and headphones are fully working.

The other day HDMI audio worked but when I rebooted it was not working again. It only works about 5% of the time. Is there any boot arguments or kents I could use to get the audio working? Or any other ideas?

I have also tried using FakePCIID_intel_Hdmi_audio.kent , Commander.kent and tried using hackintool to create a patch which I could not get to work.

submitted by /u/Fit_Fan_8305
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