Just buy from a company which specializes in building laptops for Linux, they chose those components for which there are free software drivers already available so it never will be a problem.
This way you're not only helping yourself but also invest into companies which make sure stuff is working on Linux, as they grow all the other OEMs will see the potential and adapt (hopefully).
1. http://system76.com/ 2. http://tuxedocomputers.com/ 3. https://www.entroware.com/
and so on ...
This way you're not only helping yourself but also invest into companies which make sure stuff is working on Linux, as they grow all the other OEMs will see the potential and adapt (hopefully).