No, you should not use "dsmetool -k /usr/bin/camera-ui2" as you never loaded camera-ui2 with dsmetool. When you have closed the x-terminal you can check what is running by typing . There should be no camera-ui2. If there is then type . Then as root, you type . This re-establishes the old default camera interface in a way that will have it auto-reload if it crashes etc.