I already installed linux-mainline once before but it would not boot, no matter what I edited in grub.cfg. According to some knowledgeable folks, this was due to the fact that I hadn’t edited the PKGBUILD. I am currently in the PKGBUILD and have not the faintest idea of what I am meant to edit to have a successful installation. I am also not sure which modules I am meant to have in /etc/mkinitcpio.conf to see any progress. Reading through the Arch wiki isn’t helping, unless I am looking in the wrong place or am too daft to see that what I am looking at is what I need.
The reason I wish to switch to linux-mainline is that my my AMD GPU requires Linux 3.13 at the minimum to be able to boot and display anything, while Linux 3.14 will give AMD’s open source driver for the card a considerable performance boost. I sadly keep hitting a brick wall, and not just with this particular issue.