I was contacted through the NM mailing list and told to set the gateway of the lan cards to 0.0.0.0
this enables exactly the functionality that I like, and I am glad to say that this is not a bug now, just a confusion on how to configure the interfaces. -- Network Manager having issues with two concurrent connections https://bugs.launchpad.net/bugs/299284 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs