I keep getting retroarch not configured using fallback. (Nacon MG/X Pro is not configured using fallback)The controls kind of work, but hot keys don't so fallback is crap.
I updated the the controller profile pack on line and did not help. This tells me we need make our own controller profile.
Generating a controller profile
If your controller is not recognized by RetroArch even after updating the profiles, or if RetroArch's matching profile is not suitable for you controller, you can generate a new profile to use.The first step is to proceed to a manual mapping of your pad. For this, unplug all the other joypads, and use Settings->Input->User 1 Binds->User 1 Bind All. Make sure that your mapping is perfect by testing every button in the menu and in some games.Then use Settings->Inputs->User 1 Binds->User 1 Save Autoconfig and the profile will be saved to your disk.
Important note
You should now do a Settings->Inputs->User 1 Binds->User 1 Bind Default All to reset the manual settings. Otherwise they would take precedence over the profile you generated.