"4.vm will boot from iso again." That is due to you having set the boot order manually, usually virt-manager would boot from CD once and not again afterwards.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1930398 Title: libvirtd unable to execute QEMU command 'blockdev-remove-medium' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1930398/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs