Welcome to the club. You are hardly alone in facing this problem.
See:
https://bugs.launchpad.net/ubuntu/+source/knetworkmanager/+bug/259278
and duplicates.
Welcome to the club. You are hardly alone in facing this problem.
See:
https:/ /bugs.launchpad .net/ubuntu/ +source/ knetworkmanager /+bug/259278
and duplicates.