@Arcuza The real fun starts when you enable "save config on exit". LOL!

Try to read this thread carefully:
https://retropie.org.uk/forum/topic/2199/specific-retroarch-emulator-settings-are-being-over-written-after-i-quit-the-game

How come it's only the triggers/shoulders that didn't work...?

Also, why does it register as 6, 7, 8 and 9 and then not even register those lines to the cfg file?

Anyway, thanks guys, you are legends. Been trying to fix this for days

@caver01 awesome detailed answer.. thanks for the feedback!

Thank you! works again!!

@megasweet : lets move this conversation to the GitHub issue

It was me that was blind... I found it... =)

It all has to align with the ROMs and BIOS being compatible in the NeoGeo or Arcade ROMs folder. I cannot link you to any files that I am certain are compatible but do some searching and forum hunting at some emulation sites. I been having good experience with the latest NeoGeo game files and BIOS. No need to go back to older stuff IMO.

https://github.com/retropie/retropie-setup/wiki/Transferring-Roms

I fired up other games on lr-FBA-next last night and the overclock I did for Metal Slug was saved for the core across all games. Not sure how this affects anything if it's worth just leaving alone.

NM...apparently I didn't look close enough while poking around in the setup script. :-\

@mattw24 It seems that you have no hotkeys to savestate, and this is why it is not working.
Try it without the trailing 2> /dev/null (this let us see the error messages, if they exist). Just:

grep -R save_state_btn /opt/retropie/configs/all

I suggest you to reconfigure your joystick in emulationstation: press Start and select CONFIGURE INPUT.

Reading suggestions:

https://github.com/RetroPie/RetroPie-Setup/wiki/FAQ#how-do-i-change-which-buttons-to-press-to-exit-an-emulator-with-a-controller

https://github.com/RetroPie/RetroPie-Setup/wiki/RetroArch-Configuration

I'm sure your problem is very simple to solve, and I'm sure that if you read and understand the links above, you'll solve it easily.

Thanks for all the help @Floob. I noticed while setting up a second controller that emulation station seems to reasign A and B any time you set up a new controller and go in and out of an emulator. Is this a bug if so I would think it needs to be fixed not to cause anymore confusion. Seems to only happen with these controllers. I fixed it by manually updating es_input.cfg but I had to do it twice because of this.

ohhh baby! that 4.0 is awesome.. a lot cleaner interface than that of the 3.x version.

I found a different rom that works perfect.

@Kristopherson05 said in Famicom Disk System ( FDS ) and lr-FCEUMM:

Excuse me but when I try to play famicom disk system games in general it boots me back to the main menu. Im no tech wiz so I have no idea what to do. Do I have to do something with the BIOs to run .fds games?

You need the file disksys.rom and it needs to be in the bios folder. Fceumm cuts off video on the left and right side of the screen. Nestopia does not. I personally would use nestopia. Same with nes games. (Unless you are using retroachievements for nes games which only works in fceumm. Fds games dont support retroachievements so i would use nestopia)

For others who have this issue, I figured it out.
The config file for individual emulators is in home/pi/.config/retroarch/config
deleted the config file and all is working fine.

LOL yes nice to meet you too.