This turned to be an AT&T VPN client problem. Setting NETVPN_DEF_DOMAIN to "" on /etc/agnclient/agnclient.conf fixed it.
** Changed in: network-manager-applet (Ubuntu) Status: New => Invalid -- Invalid multi values domain string generated by network manager https://bugs.launchpad.net/bugs/291161 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to bind9 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs