Another reason why it's morally superior to buy Intel if you care about open source instead of just being some shill who acts like he is a God because he made it halfway through an Ubuntu install once: AMD has dumped some out of date documentation on the internet for third parties to do their Linux driver development for free... Intel *pays* people to develop the entire Linux graphics stack.. and yes, that includes pretty much the entire infrastructure that makes it possible for any AMD gpu to run in Linux. If you want to be such a purist do this: Take out all the code that bad-old Intel wrote and see how well your amazing AMD graphics work on Linux, now do the reverse with AMD & Intel: guess what still runs fine because AMD doesn't do squat for the Linux graphics stack?
This isn't true. While AMD's main focus is on their proprietary driver, they do pay for developers to make an open source driver. Important recent driver work includes enabling uvd, better power management, and continued work on enabling the 7000+ series. Intel doors seem to get more done, but AMD is working with the community too.
Also, Intel still refuses to use the gallium 3d architecture. Gallium is supposed to help centralise various pieces of writing a graphics driver, making less work for everyone. By not using gallium, less work is shared, meaning more work for the other 3d drivers. So while they are definitely a Linux friendly company, they sure aren't perfect.