Thanks for the help and advice so far

I did manage to resolve this by -

1). Installing the PINN multi-boot software from the Raspberry Pi Imager

2). Using PINN software to set-up a dual boot set-up on the SD card

3). Installing -

3.1. Raspberry Pi OS
3.2. Retropie OS

4). Adding the various games and ROMS that I wanted on each OS / partition.

Seems to me that even with the HDMI port disconnected, the Pi thinks that a composite display is connected.
Sorry, but I have no idea how you can convince the OS that you're using a DSI display and whether that will work without X11/Wayland on the buster. I noticed in the RPI docs that there's a KMS type overlay for the display which would make it work without X11/Wayland (as required by RetroPie), but I'm not sure whether that would work without installing the lateste RaspiOS (which is based on Debian 12 bookworm).

@Chilred said in Sinden on RetroPi does not start:

This one.

This is not a stock RetroPie image/installation - I advise you to ask the author of the image/scripts for help, since we don't know how those extra scripts work.

Please try to add the recommended information: https://retropie.org.uk/forum/topic/3/read-this-first

Also, check your roms files, they must have one of this extensions : .cue .cbn .chd .img .iso .m3u .mdf .pbp .toc .z .znx ,
more here: https://retropie.org.uk/docs/Playstation-1/

@ExarKunIv thanks. Will look into these unofficial ones you mentioned

Should work fine on an SSD. You just have to install manually or use an unofficial build without support. You'll probably gain faster OS boot times.

@ExarKunIv Much appreciated! Thanks!

@sleve_mcdichael Thanks sleve, typo on my side in the post. I was using "\". tried without the c$ as well. I installed winSCP and it popped up right away. Transferred all my files that way. Thanks!

I am using w32imager and 7zip to compress the image. From 15 GB, it's shrinking to ~ 5 GB.

@thewillrussell said in Number of Problems On Retropie: Splashscreen directory can't find mine:

I tried posting a follow up post on the topic but that asshole moderator Mitu took it down

Oh, no. Come back after you've learned to behave in a forum.

@compukit said in replacing the respberry pi 3b+ for a nieuw respberry pi 3b+:

@windg wel tray it bad its nog 100% workt.
a8db7a78-9690-41bd-ba05-004e59aaf327-20240104_223659.jpg

wel im wondering if itsposebal to copy the config filesend te config of the controlesover from the old one to the nieuw one or at lease a way to see what butten is use for what and what shripts are instald ?
whis i did make a walktrouw when i build the thing

Thanks!
Sort of resolved.

I went through the verbose log.
Found:

[WARN] SYSTEM DIR is empty, assume CONTENT DIR /home/pi/RetroPie/roms/psx/Silent Bomber (USA).cue [INFO] Environ SYSTEM_DIRECTORY: "/home/pi/RetroPie/roms/psx/". no BIOS files found.

Okay, odd, but lets just try putting a bios file next to the rom...

If I put the bios files in the same folder as the ROM the bios gets found and performance improves as expected. Aka: Audio gets more consistent and it does no longer randomly just hang.

This might not explain why it doesn't find the bios where it is supposed to be according to the docs. but then again who knows what I messed up when I set this up a few years ago. Point is the information from the log was accurate and helpful.

This log to be precise:
/dev/shm/runcommand.log

Previously I have only looked at:
/opt/retropie/configs/all/emulationstation/es_log.txt

Which ROM/game ? Perhaps the message is coming from the emulator itself. Please add some more info about your setup and error, as requested in https://retropie.org.uk/forum/topic/3/read-this-first.

@sleve_mcdichael Thanks, that seems to have fixed it.