I have removed vnc and also added multifunction='on' as you explained, but once I add the sound card built into the graphics card, the VM reports the following error.
internal error:
qemu unexpectedly closed the monitor: 2022-09-17T09:20:05.493127Z qemu-system-x86_64: -device vfio-pci,host=0000:07:00.1,id= hostdev1,bus=pci.0,addr=0x6: vfio 0000:07:00.1: failed to setup container for group 12: Failed to set group container: Operation not permitted
Translated with DeepL