Navi 10 HDMI Audio - No Sound Output (Catalina 10.15.4)

[pontual]

Hey,

I have the following setup with a Vanilla Catalina install (Clover EFI):

Gigabyte B360M AORUS Gaming 3
I5-9600kf
RX5500 XT
Broadcom bcm94331 (via PCI-e adapter)

Catalina detects both my Onboard Realtek Sound Card and the HDMI output adapter (it even lists my monitor as one of the audio outputs):

However, no audio output is really played via HDMI. Just for information, on the same machine, everything works fine on Windows 10.

These are the my Clover boot args:

-v -cdfon slide=0 agdpmod=pikera alcid=1

Any idea what else I could try to make it work?
I'm attaching here the IOREG file, KEXTCACHE output and my EFI folder.

Thanks

 

[pontual]

The same graphics card as you, can you now output sound through HDMI

No. TL;DR: Audio output works if I use the Display port, but it doesn't when I use only the HDMI port.

I couldn't find a way to fix this issue yet.

 

[gogowin113]

Me too. Basically the same configuration. Sound is OK on DP but no sound on HDMI.