In mame4all I press the 'tab' button to bring up a menu.
When I click to change some player 1 or player 2 control behavior, it does not react to me pushing the buttons or moving the joystick. I am using this https://github.com/ian57/Raspicade-Retrogame-2Player-BPlus for the GPIO input and it does actually work inside the game, but not on all buttons.
When I run retrogame I get inputs on all buttons and joysticks, but even the same buttons that work inside games do not respond once I've pressed tab am inside the menu? I haven't heard of evtest before, does it do the same as retrogame?