No HDMI Audio option available for Intel UHD 750 iGPU in UNRAID VM

Hi All,

So after 2 days straight of searching & trying to get my LibreELEC VM to work, I have no choice but to ask for help so I hope this makes sense as I'm pretty new to all this.

I've manged to get both the Video & Audio passthrough to work from my Gigabyte z590 MB & i7 11700k CPU but the problem I'm having is that there is NO option within LibreELEC / Kodi to select a HDMI audio output.

The only audio options that are working is via the i/o panel on the rear.

I have tried multiple VM setups from Q35 / i440fx / OVMF / seabios but to no avail. Originally I could not get video to passthrough but a simple syslinux config input of "video=efifb:off" fixed that and stubbed Unraid from hogging the display port.

Is it possible that unraid is hogging the HDMI Audio also?

Can someone please point me in the right direction or is it even possible without some sort of driver?

Still no joy on this at all, worth mentioning I've tried builds "LibreELEC-Generic.x86_64-10.95.0.img" & "LibreELEC-Generic.x86_64-11.0-nightly-20230204-7beffea.img" but to no avail. Sadly the Stable build "LibreELEC-Generic.x86_64-10.0.4.img.gz" is not compable with the 11th Gen CPU/iGPU.

When I run the command: aplay -l

**** List of PLAYBACK Hardware Devices ****

card 0: PCH [HDA Intel PCH], device 0: ALC1220 Analog [ALC1220 Analog]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 1: ALC1220 Digital [ALC1220 Digital]

Subdevices: 1/1

Subdevice #0: subdevice #0

Its as if the HDMI audio device is not being loaded at all,

I can confirm that the iGPU HDMI audio is working correctly by running Windows 11 via USB and indeed sound workings via the HDMI.

please can someone shed some light on this!

Quote from chewitt

HDMI audio is dependent on the OS seeing the EDID data needed to determine audio properties. Does LE work when booted natively on the hardware (not being forced via UNRAID)? If yes, the problem lies with how UNDRAID handles the pass-though of hardware.

NB: LE does not (and never has, and has no plans to) support being used via Hypervisors so while it might work sometimes, it's not something we seek and there could be other things missing.

Thanks so much for your reply, much apricated. I just tested LE outside of UNRAID on my current hardware and I can confirm all is working ok, so as you mentioned its to do with Unraid passthrough no working correctly.

Thanks for that push in a positive direction at least now I know where to pursue!