How do I find out the wiring of display interface ports (VGA, HDMI, DP) of laptops with optimus technology before purchasing?

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http://askubuntu.com – I am shopping for a new laptop. Most new laptops come with a hybrid graphics setup and often with NVidia (Optimus). I am eyeing a Samsung Series 7 Chronos NP700Z7C-S02DE. It has an integrated Intel graphics card and a discrete Nvidia with Optimus technology. It does not have a BIOS setting for the hybrid graphics (at least i could not find it, but the BIOS is quite minimal anyway). I saw some reviews that say that the Ubuntu support should be quite good with some minor and fixable issues. What I didn't see is whether attaching an external display works. The main problem is that if the ports (HowTos)