Comment 4 for bug 1313393

Hi Simon,
  1) Apparently so - I just rebooted the vm to see if I could repeat it, and it was already stuck at 100% and non-responsive.
      (and blueskaj who confirmed it was seeing the same problem on irc)
  2) /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/run/sendsigs.omit.d/network-manager.dnsmasq.pid --listen-address=127.0.1.1 --conf-file=/var/run/NetworkManager/dnsmasq.conf --cache-size=0 --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/etc/NetworkManager/dnsmasq.d
(typed so typos are probably mine)

sudo killing the dnsmasq and then reenabling the network interface on nm gets it working again.