I upgraded to artful and suddenly have DNS problems. It looks like NetworkManager is setting a custom nameserver in /etc/resolv.conf
# Generated by NetworkManager
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nameserver 127.0.1.1
When I change the line to 192.168.1.1, it works again. But, it gets overwritten a next network change.
Note: dnsmasq is not installed!
sudo resolvconf -u
?