I have lost the SELECT+START hotkey on the controller that allows you to exit the emulator.
I found the config file for the XBox 360 controller:
sudo nano /opt/retropie/emulators/retroarch/configs/XBoxGamepad\ (userspacedriver\).cfg
And added the following to it:
input_enable_hotkey_btn = "8" input_exit_emulator_btn = "9"
This made no difference other than the ESC not working either, and having to three finger salute to get control back. Frustration so far.
I found I could get those lines to work in the /opt/retropie/configs/all/retroarch.cfg but it disabled the ESC, I want to have my cake and eat it.
LATER: It looks like the select is now a toggle for the hotkeys, because when I press it ESC on the keyboard or SELECT on the gamepad work to leave the game. Now to work out how to make the keyboard live for hotkeys and SELECT the toggle…