Xbox One S controller (via Bluetooth to Linux) isn't binding Start or Select in Nestopia

I'm trying to use the emulator Nestopia with my Bluetooth Xbox One S controller. I'm able to use the controller completely fine in other games and emulators, but for whatever reason when I'm binding the buttons for Nestopia, it doesn't detect that I'm pressing Start or Select. Every other button binds just fine. This is a problem because most NES games require you to press Start to actually start the game. Any help is appreciated.

I'm on Ubuntu by the way (xfce).

Solution 1:

Okay so I found a fix that I can't believe I didn't think of before. Obviously, the NES controllers didn't have shoulder buttons or triggers, so just set those to Start and Select. Not the most ideal as my thumbs are trained to move to the center of the controller for them, but it's a fix I'm happy to stick with.