I'm not that keen on kernel device hierarchy, can it be that events kernel entry points rely on available inputs (which in case of the missing udev rule aren't available)?

It's the other way around - kernel input events are the lowest level, upon which higher level APIs are built (i.e. joystick or gamepad APIs).

What I am sure abt and can replicate it, is that without the rule evtest doenst show the gamepad as normal user, while it shows it as super user.

I cannot replicate it, but I'm not running the same configuration as yours (i.e. desktop environment and extra udev rules from MoltenGamepad).

One more think I've noticed is my raspios keep asking me to update sdl and sdl-dev library which were not automatically updated by apt ugrade, and that for some reason the retropie installation start from source and compiles everything, which it didn't seem to happen the first time I've installed it (but I'm not sure abt that)

That's ok and it's not a cause for your issue.

@tamperedmedia i think I fixed it . Double checked all of my wires and ,while identical, select and start weren't connected in the right spots on the encoder. Once wired correctly I set both bindings in retroarch without bothering to set player 2 on the retro pie home screen. It still inverts up and down for player 2 on the main menu but it seems to work properly in game so it'll work as it is.

Hopefully it won't break again, appreciate the help.

managed to resolve myself.
Apparently these are just warning messages and are only preventing successful compilation because of the -Werror flag in the makefile. Removed that flag and it now compiles successfully

@mitu FANTASTIC !!!!
Everythings working with lr-fmsx!!! I focused to much on Lr-BlueMSX. For Lr-BlueMSX, It's only playable with keyboard . The joypad working only for Coleco. Not enough gamepad buttons are associated with basics keyboard fonctions. They should enable the "RetroPad Keyboard Map - Joypad - Awaiting description" option in Control menu in RetroArch for MSX.
Thank you
REGARDS

@Solid-One yes if you are already in retroarch systems the order wont change but when you exit and go back in it takes usb order as was the case in your situation.

@krullbeast said in can udev read i2c and hardwired GPIO buttons simultaneously?:

do you think it is possible to read the i2c data and also the A and B buttons inside of retroarch?

Not an expert on this, but I think RetroArch doesn't read directly from GPIO (I2C or otherwise), instead it uses an established input driver (udev/sdl/etc.) - https://github.com/libretro/RetroArch/tree/master/input/drivers.

@backstander

I don't think so. I'm looking for a file that would effect one game only. I suppose I could do it for all games at a push.

Nevermind.... it doesn't work.

I tried redoing my configs because the switch pro controller would get recognized 1/4 of the time. Ended up with the Pi detecting the pro controller but not the switch pro controller.... I don't get with this is so difficult with the switch...

@alistaircg which folder are you running the roms from? /roms/mame-libretro?

@tmntturtlguy It's a zero.

@skeggylad Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first (as agreed when registering).