OMG I like to complicate my life ! Sorry for the inconvenience. I will read more the docs from now on. When I think about it... I learned a lot from my negligence. It can be enjoyable to look outside the box.
Yes, that's correct. You have a gamepad, so the syntax would include the btn part, as you've already noticed - I realized after posting the example that the configuration part is covering the default keyboard mapping in RetroArch.
Using the RGUI you can also check what values are assigned to each button, just to check if your mapping are considered. Note that you cannot use 1 single gamepad for 2 players - as you've posted, RetroArch doesn't support that (it does support to use 1 keyboard for 2 players though).
@akamming I’m in the same boat as you as far as running an ipac2 in redream. I can’t seem to configure my input for more than one controller per port. Can you please walk me through how to get it up and running. I did read what you did for a workaround but I’m pretty new to the raspberry pi and found it a little hard to understand. Thanks in advance!
SOLVED!- it was in the coding- I had buttons double-coded so to speak and had a bunch assigned to R_X/Y plus&minus (input_player1_r_x_plus_btn = "5" for example) as well as what they should've been assigned. HUGE weight off my back- I've been poking around like a blind squirrel.
@jodiefoster The point is that neither you nor we know what exactly was changed under the hood which may be the source of problems you won't have with the official image. Only the person who made this custom build knows that, so you should ask them or use the official build.
We don't offer support for 3rd party images, especially the ones loaded with ROMs. If you want support here in the forum, start with the RetroPie provided image from retropie.org.uk/download. Otherwise, contact the author of the image and ask for support.