Taking a cue from https://bugzilla.redhat.com/show_bug.cgi?id=1166199 I worked around the issue by adding the following to my /etc/NetworkManager/NetworkManager.conf
[keyfile] unmanaged-devices=interface-name:virbr0 Yet I imagine that the real solution is something more general. ** Changed in: network-manager (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1432599 Title: Network-manager tries to manage virbr0, which it should not To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1432599/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs