I am using Ubuntu 12.04 on dell E6420 with Nvidia NVS4200M.
I can configure any external display properly using NVIDIA X Server Settings, but monitors are not recognized automatically nor recognized as absent automatically - every change i make must be manually defined and applied. This can be annoying as i move around a lot and use many different displays/projectors.
I have found discussions of a similar problem here
any help would be appreciated.