Works with latest version.
If kcontrol is still empty for you :
sudo apt-get remove --purge kdebase-data && sudo rm -rf /etc/xdg/menus/kde-* && sudo apt-get install kubuntu-desktop
That will resolve your issue.
** Changed in: kdebase (Ubuntu)
Status: Confirmed => Fix Released
--
kcontrol is empty
https://launchpad.net/bugs/80444