If you upgraded your Kubuntu KDE Desktop from 12.04 (precise pangolin) to 14.04 (trusty tahr), and tried to connect your laptop to a projector, you will be, like me, frustrated with the default "Monitor and Display" settings that pops up. You can't unify outputs easily.
To overcome this, install the kde-workspace-randr package. It will provide you with an icon in the system tray where you can unify the outputs and change each's resolution more easily.
Do it using the following command, or use your favorite software installation program:
sudo aptitude install kde-workspace-randrContents:
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