This is as of today (25.3.) still broken in the way I described above, using two wired interfaces. Im running Feisty Herd 5 updated to all latest packages. Still am unable to configure 2 interfaces using the network manager, can only have one active interface at a time.
-- network-manager in feisty is broken https://launchpad.net/bugs/82715 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs