[Dual Monitor] Dual monitor setup, both connected, want only one enabled, settings lost after reboot

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http://www.kubuntuforums.net – I am running Kubuntu 12.10 and have a dual monitor setup (HP main LCD monitor + Philips LCD TV). I've installed propriatary nVidia drivers. At the moment, I manually connect the TV whenever I want to watch a movie and disconnect it when I am done. I am forced to do this because the TwinView configuration I do in nvidia-settings is lost on every reboot. If I just let the TV stay connected to the computer, on the following reboot I only see an empty desktop instead of login screen and I am unable to login. At this point I am forced to drop to TTY console and reboot while disconnecting the T (HowTos)