optimus dilemma

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http://askubuntu.com – I plan to buy a customized laptop in a week. My main OS on the system would the latest version of ubuntu. Almost all the laptops I am interested in, seem to come with Nvidia optimus and I am well aware that optimus and ubuntu don't play nice with each other. I would simply like to know what can I expect if I get a customized laptop with nvidia optimus and install ubuntu on it. Would I be able to use the Intel Graphcis Card for most of my work and switch to the card only when I need to? Would I be able to switch off the Nvidia card when I don't need it, to save on power? Would I be better o (HowTos)