Hi. The following workaround worked for me:
Try setting the CPU type to be a "simple old CPU" without a lot of features. For example, the following change fixed the problem in my case: --- a/libvirt/qemu/machine.xml +++ b/libvirt/qemu/machine.xml @@ -19,8 +19,8 @@ or other application using the libvirt API. <apic/> <pae/> </features> - <cpu mode='host-model'> - <model fallback='allow'/> + <cpu mode='custom' match='exact'> + <model fallback='allow'>core2duo</model> </cpu> <clock offset='utc'> <timer name='rtc' tickpolicy='catchup'/> Can you try that and see what happens? Thanks.