Hi, I passed through my Intel HD P630 gpu to my LinuxMint VM.  I also see Intel Corporation Sunrise Point-H HD Audio.  It's on a different IOMMU group. 

 

See the group's content:

 

IOMMU group 13:	[8086:a149] 00:1f.0 ISA bridge: Intel Corporation Sunrise Point-H LPC Controller (rev 31)
	[8086:a121] 00:1f.2 Memory controller: Intel Corporation Sunrise Point-H PMC (rev 31)
	[8086:a170] 00:1f.3 Audio device: Intel Corporation Sunrise Point-H HD Audio (rev 31)
	[8086:a123] 00:1f.4 SMBus: Intel Corporation Sunrise Point-H SMBus (rev 31)

Any suggestion?

I have the same issue and there is a workaround that has worked for some. Hope this helps

 

Thank you blewstar for pointing it out!  It worked!