The files in /etc/libvirt/qemu are designed to be used and managed by libvirt and not to be edited by hand. The correct and documented way to make changes to your machine definition is mentioned in comment #8 in this bug.
** Changed in: libvirt (Ubuntu) Status: Confirmed => Invalid -- Permissions of files in /etc/libvirt/qemu are too restrictive https://bugs.launchpad.net/bugs/235386 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libvirt in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs