Answering myself, because I'm an idiot. Sorry.

In the emulator's settings (on the GUI) I had to (re-)assign a correct mapping for pause.
It had kbd.esc and two other weird keys from the controller assigned to pause.
I assigned the button behind/below the right shoulder key to pause, no idea what those are called.
Which in my case resulted to the following in controls.ini:

[ControlMapping] ... snip ... Pause = 1-111,10-197 Rewind = 1-67

So, 10-197 is the key that was missing.

If i would use Ipac2 in keyboard mode is this better for the Retropie experience?

Not necessarily.

I choosed the gamepad mode for the configuration under Emulationstation for two players . Because in keyboard mode is only one player input configuration is possible (but Keyboard mode functioning under PPSSPP awesome). I know under Retroarch I have a possibility to configure a second player input too.

Yes, you can configure a 2nd player for a keyboard device, but that can't be done from EmulationStation and you'll need to edit the configuration files (retroarch.cfg). RetroArch expects mostly a gamepad since it started as a console oriented front-end emulator.

I don't really understood configuring inputs under Emulationstation , is this for the standalone emulators or just for the controlling / steering the Emulationstation. Retroarch is for the Libretro emulators input configuration ( I hope this is right ?)

Configuring the inputs in EmulationStation will auto-configure them also for RetroArch and a few other standalone emulators (Mupen64Plus/Daphne/OpenMSX). Any libretro based core should have a configuration ready once you've done it in EmulationStation.

This is getting off-topic here, if you have some more input related questions, I suggest starting a separate topic and reference your posts from here.

Please provide some info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.

Is the PPSSPP emulator even installed ?

Thanks guys, that was exactly the problem. I followed the thread @windg provided, and it worked first time. I really appreciate you guys

@lister-of-smeg I was halfway through another process on resolving the issue when I saw this post, so I didn't get a chance to try it myself. I appreciate your help and the knowledge you shared though!

This whole mess was a lesson learned for me, so I'm on the same page with backing files up now. Copying that RetroPie-Setup folder was my first priority before running git reset --hard. Thankfully, it doesn't seem like anything broke.

@hunksurvivorx Agree it's something to do with the newest update. It was perfect before because I played it briefly back in july. Playing it with the latest build and the sounds is terrible and even screeching at times.

@sirhenrythe5th said in PPSSPP menu showing text:

I use it wired most of the time as my cats disturb the Bluetooth connection by sitting on my lap (no joke :D)

Your cats are radio-active :)

....But not completely. I saved state during the "off to Mist village" intro animation and now the game never runs anymore, even after deleting the saved state and reinstalling the rom.

the logs show:
Executing: /opt/retropie/emulators/retroarch/bin/retroarch -L /opt/retropie/libretrocores/lr-ppsspp/ppsspp_libretro.so --config /opt/retropie/configs/psp/retroarch.cfg "/home/pi/RetroPie/roms/psp/FF4CC.cso" --appendconfig /dev/shm/retroarch.cfg
glGetError 0x500

I'm mainly wondering if there's some other, deeper config besides the retroarch file in the ppsspp folder somewhere that got distorted by my save state.

@phane Thanks for the tip, now it's working properly!

@mitu i'm back if you're still here for some reason...
i tried again for the log.
here it is: https://pastebin.com/U96FjKBt

@windg thanks man, i will check it later...I assume that the issue has to do something with the raspberry pi GPU, cos having the latest source, latest PPSSPP version, overclocked...could it be a GPU malfunction?

@mitu said in How to donwngrade PPSSPP to v1.5.4 (solved):

@stumcbill said in How to donwngrade PPSSPP to v1.5.4 (solved):

Ah ok, is there anyway I can reinstall the version that comes with 4.7 to see if it makes a difference?

Since PPSSPP isn't installed on the 4.7 image by default, even if you download the 4.7 image, installing from binary will still get you the current/last version. So, no - you can't reinstall the old version from RetroPie-Setup.

Ah, I never realised that. Sounds like I’m out of luck then.

Thanks

@mitu holy cow, it actually worked. Them guys are really quick, seeing how I installed the emu only last week.

Thanks :)

@huey no, let me check it

@kay-row it should still generate a log in the same location, after launching as normal

@ReadyPlayaWon thanks!
I removed the other PPSSPP I had and installed the lr-PPSSPP package, the controls all worked out of the box!
Thank you again!

In 2.0.10, it looks like a hint was added (SDL_HINT_GAMECONTROLLERCONFIG_FILE) to point to a user chosen 'gamesdbcontroller.txt' file. It looks like PPSSPP doesn't use this mechanism to load the file, but it might affect how SDL2 works when the game controller API is initialized by the emulator.

I'll see if a recent source build for PPSSPP triggers this on a RPi, it could also be something that's changed in the emulator since the last binary build in RetroPie.

@quicksilver
In buffered I get this, but I don't know how to change it in lr-ppsspp, but in ppsspp it gives me a black screen.