This is old, but a simple solution in mame2003 and mame2003-plus.

Display the mame menu. This can be opened via core options (under system).

In the menu, select the top option input (general)

Then for config menu, select it to clear the current bind, then quickly double tap on it to bind None.

Turn off the mame menu in core options, return to game for changes to take effect, then close the game.

baluba-250109-085331.png

If you're in lr-mame emulators you can just hit TAB to get to the "mame menu" and most (not all) games have a difficulty setting.

@mahoneyt944 thanks!!!!

@victimrlsh said in MAME internal menu won't come up anymore:

responsive in lr-m

you really should updated from source there are fixes in mame2003 retropie isint on the lastest commit