I’m talking to myself here, but maybe this will help someone facing the same issue. I finally got 2 controllers working.

I have 5 SNES controllers: 1 old official, 3 new non officials that i bought from Adafruit and 1 old non official “Super-4” turbo controller. All of them work fine on my Super Nintendo.

On the Pi with the GPIO Adapter, i always tested plugging in my official gamepad and one of my Adafruit gamepads. And i had issues with this configuration. Today, i tested with my 2 old controllers (official and “Super-4”). Both worked without any issue with the official SNESDev driver. No ghost buttons, no issues when both are plugged in at the same time.

So this means that the recent SNES controllers from Adafruit don’t quite use the same settings than the old controllers. They work on my real SNES, but have issues on the Pi. Old controllers work as expected. Or am i the only one having issues with recent SNES controllers on the Pi ?