Description in bug 38530 helped me to reproduce it here - working on the fix.
** Bug 38530 has been marked a duplicate of this bug ** Changed in: kdeadmin knetworkconf (Ubuntu) Status: Needs Info => In Progress -- [Dapper] Application Crash when trying to configure network interface thats not enabled https://launchpad.net/bugs/30775 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs