I'm not sure if it's helpful, but i've resolved many issues with Xbox360 Controller on gentoo and most of the informations are available on https://github.com/ValveSoftware/steam-for-linux/issues/5782. Suggesting to include them in https://wiki.gentoo.org/wiki/Category:Hardware)
It's a wiki. You should edit it yourself. That's what wikis are for.
(In reply to Jeroen Roovers from comment #1) > It's a wiki. You should edit it yourself. That's what wikis are for. I'm perm. banned on the wiki for a reason that are controversial atm. So i decided to share it this way since that's what i was working on before ban since it seems that lots of gentoo users are using this controller. If it's not helpful feel free to close the bug i don't want to waste your time.