Created attachment 1800820 [details]
libvirtd.log

Description of problem:

When a VM like the one in the attached libvirtd log is created and started on an AV 8.5 host, the following line is added to its domain XML automatically:

  <audio id='1' type='spice'/>

Such a VM cannot be migrated to AV 8.4 hosts, with libvirt 7.0.0 and QEMU 5.2.0. A migration attempt fails with:

  unsupported configuration: unknown audio type 'spice'

Version-Release number of selected component (if applicable):

libvirt-daemon-kvm-7.4.0-1.module+el8.5.0+11218+83343022.x86_64
qemu-kvm-6.0.0-21.module+el8.5.0+11555+e0ab0d09.x86_64

How reproducible:

100%

Steps to Reproduce:
1. Start a VM like the one in the attached log on a host with AV 8.5.
2. Try to migrate it to a host with AV 8.4.

Actual results:

The migration fails.

Expected results:

The migration succeeds.

Additional info:

The problem has been observed in RHV.