That is expected behavior; you'll want to create a new connection for fixed rather than modifying the default one. In any case, if the default dhcp connection is changed, you should have two connections so that standard DHCP can still work for wired.
Since this isn't a bug but expected behavior, I'm closing this report as "Invalid". ** Changed in: network-manager (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1059065 Title: Network Manager does not connect the network adapter to a network with a DHCP server automatically To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1059065/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs