I have 4 controllers, 2 Afterglow Xbox 360s and 2 Logitech F310s.
All 4 controllers work perfectly on ZSNES on both my computers, but Snes9x doesn't recognize any of them. When trying to configure the controllers in the Preferences menu, nothing happens.
Has anybody been able to get controllers to work with the Flatpak? What did you do? I can work around the issue on Mint 18.3 by using Antimicro to map keyboard keys to controller buttons, but the devs of that app have stopped supporting it and it's not available on 17.10.

Any help would be greatly appreciated!