I found a workaround for this!   The culprit is the cpu-mode "host-passthrough". If I switch to "Emulated QEMU64" the VM boots up again. Switching it in the gui should work if you havn't setup any special CPU flags. Another way is to edit the xml like the following:   change <cpu mode='host-passthrough' check='none'> <topology sockets='1' cores='2' threads='1'/> </cpu> to <cpu> <topology sockets='1' cores='2' threads='1'/>
    • Thanks
    2