[ubuntu] "Ominous Optimus"!

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http://ubuntuforums.org – Hello all, I'm running 12.04 Precise 64bit and have the dreaded dual video situation that for whatever reason Dell used in the XPS 15z. (I know, in Windoze it supposedly exists for better power management.) Has anyone been successful at getting Optimus to work short of using Bumblebee? Is it safe to install nVidia's 'driver' for the 540m nVidia card and just not use the integrated Intel graphics? If I'm not mistaken the HDMI output on the side of my laptop is using the dedicated nVidia card in the machine. Is this correct? If so, in order to use it, do I need to have two different xorg co (Hardware)