Univention Bugzilla – Bug 48535
Snapshot restore breaks <cpu model="host-model">
Last modified: 2023-06-28 10:46:03 CEST
When snapshots are created and restored the <cpu model="host-model"/> placeholder is replaced by the concrete host-model; this persists even when the VM is powered down, which will prevent migration to hosts with older CPUs. This can be fixed manually by running "virsh edit" and replacing the concrete model again with the placeholder. (This again will break with the next snapshot) Even worse libvirt seems to contain a bug where for an powered off VM a flag is mentioned as required in the concrete CPU model with QEMU is not able to provide/emulate. The VM then cannot be started even on the same host where the snapshot war created. (that does not happen with all CPU models: 'krus' works, 'lattjo' seems to be broken.)
*** This bug has been marked as a duplicate of bug 48536 ***