Welcome to the club. You are hardly alone in facing this problem. See:
https://bugs.launchpad.net/ubuntu/+source/knetworkmanager/+bug/259278 and duplicates. -- unable to configure a fixed ip on wired interface on knetworkmanager (intrepid) https://bugs.launchpad.net/bugs/279409 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to knetworkmanager in ubuntu. -- kubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs