That did it. Thank you. Problem solved.

Removed everything named "ULES01372". Still got my save games.
(Did not work via SSH, becaus I was in a wrong folder. My fault.)

Solved. I updated the controller to the newest firmware. Now it works great. :)

@psyke83 Any tips on how to build from libretro's git? I don't mind testing.

It will likely require reworking of the RetroPie module script. It's still on my to-do list :-)

@herb_fargus I've pretty much tackled it as far as I'm willing to at the moment. I'd certainly revisit it later after a Pi 4 were released or if I felt the need to get a Pi 3B+.

Anyway, I've linked it properly on the wiki now. Hopefully someone finds what I've documented useful. Know I would've loved to just have a quick list of 51 games I could run on my overclocked Pi 3B.

Decided to just go with the Google Sheets method. It is smarter.

@buzz Yeah, card is fine after trying different images on it. Will start from scratch again (unfortunately) and see what happens. Thanks!

@collcroc123 the systems don't appear in emulation station until you put ROMs the their folders

Not sure why it's booting you to the command line...

Solved. Had to access emulator settings for the one second the game was booting and disable "Fast Memory (Unstable)". Boots fine now.

The person in this reddit post had a similar problem so his solution might help you too:

https://www.reddit.com/r/RetroPie/comments/7r4vr8/how_do_i_reset_control_mapping_in_ppsspp/

@glitchyboyhunter I didn't give you any 'codes', just pointed you to the file where Emulationstation might log any errors.
You just need to get the file from the Pi - you use a PC if you have one connected. You need to open the \\retropie\configs\all\emulationstation folder in Windows Explorer and you'll file the file I pointed out earlier in that folder. Upload the contents to pastebin.com and get the link here in the forum so we can better log at the log.

EDIT: Make sure that Emulationstation is not configured with Parse Gamelists only set to On (https://github.com/RetroPie/RetroPie-Setup/wiki/FAQ#why-does-shut-down-and-reboot-take-ages), otherwise any new game/rom added will not be shown. If you do, then turn it off, then restart Emulationstation.

@ryanh1323 no retroarch settings only work in libretrocores. All emulators that start with lr- are libretrocores. If you had two libretro emulators like lr-fceumm and lr-nestopia for nes then all settings in the retroarch.cfg for nes would work on both. However core settings are different and only work on that core

@DTEAM I managed to get it fixed with the help of this comment: https://www.reddit.com/r/RetroPie/comments/7r4vr8/how_do_i_reset_control_mapping_in_ppsspp/dsyj3ya/?utm_source=reddit&utm_medium=web2x&context=3

This restored my keyboard functionality and I was able to remap the controller and that worked.

@buzz

Yep completely understood, and that makes sense for the sake of keeping the releases as stable as possible. If I have time to test the Vulkan driver out I can always try to build from the master myself if there hasn't been a new release when I get round to it.

Thanks for the help as always.

Cheers

@ikarampa Is is a post that's 13 months old, opened for PPSSPP on a Raspberry Pi. You might have better results posting on the LibreElec forums to ask for advice.

@sano You know what dude? I solved the problem myself :D . You know PPSSPP for Windows for e.g. It's in the same form as the one I mentioned. But now, I want to mess with es_systems.cfg, to run it through the Emulationstation menu. You see, the reason of can only boot one file error, was that in the es_systems.cfg file, there was line like this:
<command>/opt/retropie/emulators/ppsspp/PPSSPPDL</command>
And when I was trying to open .iso file through th ES menu, RetroPie was cofused, whether it should run PPSSPPDL, or .iso file. That was the reason of occuring can only boot one file error message. Coming back to es_systems.cfg, how to edit it in order to run PPSSPPDL, through psp section??? Hardware list, if necessary:

Raspberry Pi 2 Model B 32GB Sandisk SD Card TP-LINK 150Mbps Wireless Nano USB Adapter (Model TL- WN725N) Esperanza Bluetooth USB Dongle (model wasn't specified on the box, I'm really sorry...) PPSSPPDL (non-libretrocore version, but I told you about it before)

@mitu much appreciated.

@BuZz , have you read this topic to fix the controller on the future Retropie Update ?
For the screen i'm sad but i don't found why it's not working fine :(
Thanks