Libvirt can generate busted nodedev XML if dmidecode is wonky, see: https://bugzilla.redhat.com/show_bug.cgi?id=1217687 There's a commit in upstream virt-manager to work around this: commit e125aa69d8024fddb72dde9371f172061f388160 Author: Cole Robinson <crobinso> Date: Thu Mar 26 18:04:23 2015 -0400 nodedev: Handle busted 'system' XML This should be backported to F21 (it's already in f22+)
virt-manager-1.1.0-9.git310f6527.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/virt-manager-1.1.0-9.git310f6527.fc21
Package virt-manager-1.1.0-9.git310f6527.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing virt-manager-1.1.0-9.git310f6527.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-9641/virt-manager-1.1.0-9.git310f6527.fc21 then log in and leave karma (feedback).
virt-manager-1.1.0-9.git310f6527.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.