Can't get both 4k60hz and hdmi audio work on nuc7i5bnh.

[XianYuDaXian]

After installing Catalina on my Nuc7, HDMI audio doesn't work, so I need to specify IGPU and fake sound card ID, but if I do so I will lose my 4K60Hz. What should I do?

 

[XianYuDaXian]

I do not need to specify the igpu model or device-id to use 4k60hz, but if I specify iris plus 640, which is the model I currently using, it will be limited to 4k30hz. please help me.