Those moments when you’re angry at your past self

I’m installing Arch Linux on my BeagleBone again. Everything’s going smoothly, and now I want to ditch the Ethernet cable. Unfortunately, when I plug in the adapter, its firmware and driver don’t get automatically loaded. I know I had this problem in the past, and I know that I found the solution. But I didn’t record what that solution was anywhere.

…Damnit, past Clay.