This is not a bug nor a change in behavior, but rather something which the DAC driver in libvirt has always done. So long as libvirt is running as root, as it does by default - and must be doing in order to change the file ownership to root on VM shutdown - it should be able to run the domain again.
Could you please add the line loglevel = 1 to the file /etc/libvirt/libvirtd.conf, run sudo stop libvirt-bin; sudo start libvirt-bin Then re-try running the domain, and then attach the files /var/log/libvirt/libvirtd.log and /var/log/libvirt/qemu/<vm_name>.log to this bug. status: incomplete ** Changed in: libvirt (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1336832 Title: device permission changed on VM shutdown To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1336832/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs