Comment 39 for bug 854833

I ran into the exact same problem after updating my Kubuntu 12.04 laptop to 13.10. The password is there in the connection settings, but KDE Daemon pops up asking for the password over and over. Connection drops all the time with that, too. I ended up having to remove network-manager and replacing it with wicd (which also has a serious bug preventing you from starting the daemon: https://bugs.launchpad.net/wicd/+bug/1193856). It's a holy mess, rendering the laptop next to unusable for days.