Thanks this totally fixed it for me. Another similar version here: https://retropie.org.uk/forum/topic/28656/start-button-on-psx-emulator-doesn-t-work/2?_=1608109096986

seems odd this is the default. I never would have found that on my own!

@mitu Updating from source seems to have fixed it.

Praise the sun, omfg this finally solved my issue. I've been slaving away at this thing for nearly half a day now trying to figure out why the controller suddenly stopped working only in PCSX and only in the game itself. Had to make an account just to say this.

Ugh.. This thread should be immortalized in a polished block of marble. "Disable the Multitap BS..."

Thanks guys! This worked for me as well.
I don't update regularly, but once I did, I found same issue with my Multitap settings set to "auto", leaving my Castlevania Symphony of the Night quest on hold till I figured it out :)

Plug your controller setup in your Pi without any other controller except the keyboard, boot it up, close ES and run this

ls /dev/input/

It should show all input devices of which joysticks/joypads are shown as jsX (eg. js0, js1, ...).

If it is not present, try to look if the USB device is present with

lsusb

If a controller is present and you want to test if the device translates the PS2 buttons correctly, run this and test

jstest /dev/input/jsX

Anybody help me?;)

We don't support 3rd party images, as stated in https://retropie.org.uk/forum/topic/3/read-this-first. Either install a RetroPie image from retropie.org.uk/downoad or ask the author for guidance.

After spending the weekend thinking about which procedure was done wrong, I remembered that I performed many installations and updates hoping to fix the problem, so I downloaded a clean .img and installed it again. After reinstalling the OS the control worked correctly, thank you anyway.

After going through all the PSX RetroArch settings I figured out my problem. To change the controller to Analog you used to go to Quick Menu>Controls and set User 1 Device Type to RetroPad w/Analog. After the update, you put that back as Retropad (without the analog) as default, go to Quick Menu>Options and change Pad 1 Type to Dualshock there. Maybe this will help someone with that problem in the future.

ohh, I didn't knew descent supported that rare analog pad.
I poked around and managed to add the option to use that analog pad in the menu, it works wonders.
I just created a pull request with the fix. now it should be a matter of time for the option appear if they accept my fix.

@mitu Hi ! Thanks, indeed you are right, I used lr-pcsx_rearmed, the default one, and so I read and followed the documentation you sent to me and I solved my problem.
Thanks for your help !

Well, i must say, i suddenly found a solution that works for now.
The analog stick is working, D-pad still no response.
Anyway, i changed the controller settings but did not change the up, down, left right. Just left it as the default values.
UP : up
DOWN: down
LEFT: left
RIGHT: right

I only have changed the buttons. this setting seems to work.

So i tested the remote on some snes games and the shoulder buttons worked. I also have been able to play some ps1 games also. Not sure whats going on but it didnt work this well last time i messed with it nor did the graphics look as good and i hadn't messed with it since i encountered the issue about a month back.