@brianinkc I have used my controller with both xpad and xboxdrv, and honestly I prefer the way xpad handles controllers. Yes, you get a blinking light, but that's nothing a little hardware modification can't fix. :P
https://github.com/RetroPie/RetroPie-Setup/wiki/First-Installation
https://github.com/RetroPie/RetroPie-Setup/wiki/Setting-up-the-XBox360-controller