another (sort of) solution for this issue is to use player 2’s coin button. eg, if i have two USB SNES controllers plugged in, I can hit ‘select’ on player 2 and it puts a credit in. you have to be careful to then press start on player 1, or you might end up with 2 players joining the game (if you’re playing alone!)

it looks like the fba/mame libretro cores don’t like having the hotkey as the same key for the coin button. that makes the above make sense, as only the p1 controller has a hotkey (you can’t start-select quit with p2, by default).

has anyone logged a ticket with retroarch? with a bit of luck this issue is fixed in 1.2 already.