Not sure where to post this but I figured this was the best spot. I received a Gamecube adapter last year and have used it occasionally with Dolphin on my Steam Deck. I've had no problems with it up until this weekend, where it's started to act wonky.

It's my understanding that Valve recently added Gamecube controller support to Steam due to the new Switch 2 GC controller, which is pretty awesome but does make me wonder if it's related to my issue. Essentially what's happening is my controller connects to the Deck just fine, but the controls are incredibly unresponsive. When moving through the regular Steam Deck interface, the controller almost acts like it's on a permanent "turbo" setting, where moving or clicking any button does a large amount of inputs in a short span of time. When I loaded up Mario Kart, I struggled to finally pick a cup and couldn't move my kart in any direction but straight. Not sure if it's a driver issue or something else entirely, I just can't get it to work normally now. Also, when I checked the calibrations it looks like there's almost a drift-like effect happening with the sticks, where it's jittering all over the place despite not doing anything.

I've also tested the controller and the adapter on my laptop and it worked perfectly running Dolphin outside of Steam. Just curious if anyone has any solutions as I'm not sure what else can be done. Also worth noting that it's not a Mayflash adapter as I know that's the big third party one everyone uses, this is just a random one.