Do Ubuntu certified laptops hardware work out-of-the-box?

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http://ubuntuforums.org – I saw these laptops at the Ubuntu website. http://www.ubuntu.com/certification/...ategory=Laptop It says here that these laptops are certified by Ubuntu. It says that these laptops are certified. Particularly I am looking at the laptops with hybrid graphics, but how sure am I that these laptops will run well under Ubuntu? Is the driver pre-installed? If not, how can I get the drivers to ensure that these laptops will run well under Ubuntu. Because my currrent computer doesn't run well at all with 3D graphics. Will all the drivers be working out-of-the-box? Or will they be available throu (Hardware)