[ubuntu] [help] How to install nVidia drivers on 15' Retina MBP with Ubuntu 12.04 64bit?

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http://ubuntuforums.org – I have used rEFIt to achieve triple-boot on my 15' Retina Macbook Pro. However, for now I cannot get the nVidia drivers to work under Ubuntu 12.04 x64. Every time after I installed the nVidia Driver, X won't restart, and give me an error of "No screens found". I have tried both drivers from nVidia's website and drivers from Proprietary Drivers in Ubuntu's System Settings. They do exhibit different behaviors, though. Drivers from nVidia's website will create a seemingly correct xorg.conf file. Drivers from Ubuntu's System Settings, however, gives me a xorg.conf with only the follow (Hardware)