I just tried to find a solution for dual monitorsetup, installing gconf-editor and "additional drivers" on my ubuntu 12.10 cairo-dock desktop laptop. actually I deinstalled my bluetooth programms before this, because there was no connection to my nokia phone.
the result is, that I cant even change my desktop background image.
In the softwarecenter now I installed "system settings (systemsettings)" but it shows me only the KDE System Settings application.
what now? I cant use the second monitor.
thank you for helping!