Here are the 4 PS3 auto controller config files for retroarch modified to my needs. Take the right one for you or even all and override the existing ones (backup the old ones if you don’t like mine) in this location:
This gives you “Left Trigger + Start” as exit key and an analog stick which works exactly like the dpad.
before i upgrade to 3 beta my retropie was working like a charm using the setting killer101 provided above…I could never get the proper mapping so i did a fresh reinstall of 2.6. Im merely trying to get the start and select button to take me back to emulation station when im playing a game and get the ab and xy buttons to work. None of this seems to be happening. IM using a ps3 controller. WHen i just jstest I just get a buncha random scrolling of numbers on the screen none of which I can actually find out the numbers of the buttons. WHen i do the input check it does show I have an active input of js0…. I literally havent played a game in over a month this is starting to kill me inside.