The empty "nameserver" line comes from /run/resolvconf/interface/br0.inet which was created by the script /etc/network/if-up.d/000resolvconf from the content of the IF_DNS_NAMESERVERS variable whose contents come from the "dns- nameservers" line in the "iface br0" stanza of /etc/network/interfaces.
My next guess is that the "dns-nameservers" line contains one or more non-printing characters between the first and the second listed IPv4 address. Can you please check? If there are such characters, what characters are they? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1067043 Title: resolvconf adds an empty "nameserver" record into /etc/resolv.conf To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/1067043/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs