actually i saw this. the answer is that all devices configure in /etc/network/interfaces are by default not managed by networkmanager.
At best remove those "eth0" lines from that file and restart. ** Changed in: network-manager (Ubuntu) Status: Incomplete => Invalid -- network-manager does not handle ethernet card https://bugs.launchpad.net/bugs/424081 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