knetworkconf has written partial line in /etc/network/interfaces if you had an interface manually configured or managed by network-manager. This is now respected and such interfaces are not written to /etc/network/interfaces unless you explicitly decide for their type (static/dhcp/bootp).
** Changed in: kdeadmin knetworkconf (Ubuntu) Status: In Progress => Fix Committed -- Syntax error in /etc/network/interfaces file https://launchpad.net/bugs/18069 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs