Optimally there would be options in RetroArch to change the state of GameCube controller ports between None/Standard/Controller/GameCube Adapter for Wii U/etc. Lacking that, it was previously at least possible to change the SIDevice entries in Dolphin.ini to whatever you needed, but after updating my core those entries get overwritten every time it starts up. I'm guessing #298 is at fault?
Optimally there would be options in RetroArch to change the state of GameCube controller ports between None/Standard/Controller/GameCube Adapter for Wii U/etc. Lacking that, it was previously at least possible to change the SIDevice entries in Dolphin.ini to whatever you needed, but after updating my core those entries get overwritten every time it starts up. I'm guessing #298 is at fault?