Short update: I managed to boot the GPi Case 2 and Recalbox without any problems. To be honest, I don't know what the reason was that it didn't work. I didn't really do anything different this time, except that I used the dock on the first boot. I don't know if that was really the problem. The fact is, everything works as it should, even without the dock.

I put the micro SD card back into my PC after trying to boot my GPi Case 2.

Maybe the hardware.log will help?

[      4.51] case/manage.py(mainInstall:218): Script info - case: , previousCase: , installedCase: , phase: 0, previousPhase: -1
[      4.53] case/manage.py(DetectGPiCase2:40): trying GPi2
[      4.54] case/manage.py(DetectGPiCase2:80): gpi2: compute module 4 found!
[      4.64] case/manage.py(is_hdmi_connected:71): gpi2: error reading card1-HDMI-A-1 status: [Errno 2] No such file or directory: '/sys/class/drm/card1-HDMI-A-1/status'
[      4.64] case/manage.py(DetectPiBoyDMGCase:131): Trying PiBoy DMG
[      4.79] case/manage.py(DetectPiBoyXRSCase:138): Trying PiBoy XRS
[      4.95] case/manage.py(mainInstall:247): No case detected
[      4.95] case/manage.py(mainInstall:248): Processing case none on phase 0
[      7.25] case/manage.py(mainInstall:218): Script info - case: , previousCase: , installedCase: , phase: 0, previousPhase: -1
[      7.25] case/manage.py(DetectGPiCase2:40): trying GPi2
[      7.26] case/manage.py(DetectGPiCase2:80): gpi2: compute module 4 found!
[      7.36] case/manage.py(DetectPiBoyDMGCase:131): Trying PiBoy DMG
[      7.50] case/manage.py(DetectPiBoyXRSCase:138): Trying PiBoy XRS
[      7.65] case/manage.py(mainInstall:247): No case detected
[      7.66] case/manage.py(mainInstall:248): Processing case none on phase 0
[     78.92] case/manage.py(mainInstall:218): Script info - case: , previousCase: none, installedCase: , phase: 1, previousPhase: 0
[     78.93] case/manage.py(mainInstall:248): Processing case none on phase 1

@Scavy

Okay, that's weird. Yes, I used the Raspberry Pi Imager for flashing. I select the correct model (Raspberry Pi 4 - Models B, 400 and Compute Modules 4), the OS (Emulator and game OS - Recalbox, Recalbox - Raspberry Pi 4/400/CM4/GPi Case 2/PiBoyDMG), my micro SD card and flash it.

The GPi Case 2 is for CM4 only.

@Scavy

Thank you very much! Hopefully they'll find out what's wrong.

@Scavy

No, when I docked the GPi Case 2, the d-pad doesn't work either. The whole situation is really weird, because the installation of Recalbox is more than simple, and it worked flawlessly months ago.

@Scavy

Thank you for your answer. Yes, I'm pretty sure I'm using the right version, the handheld one.

What I forgot to mention: If I try to boot the device without the dock after installation, nothing happens. But when I have docked it and connected the HDMI cable to the dock, I can see the EmulationStation menu, but the controller does not work, so I can't navigate through the menu.

Hello!

Recalbox would be my first choice, but it does not boot after a problem-free installation on my micro SD card. A few months ago I bought a micro SD card, installed Recalbox as indicated, inserted the micro SD card into the device, started it and everything worked without any problems. Now I have bought a new micro SD card, installed Recalbox in exactly the same way, but now I have the problem that the device no longer boots. The screen of my GPi Case 2 remains black. It is not due to the new micro SD card, as the error also occurs with the old one, which worked without any problems a few months ago.

I then installed RetroPie as a test to see whether it was due to Recalbox or perhaps to my Raspberry Pi. With RetroPie, however, the boot worked without any problems. So I was able to rule out that it was due to my Raspberry Pi.

Does anyone have any ideas on how to solve the problem? I really want to use Recalbox instead of RetroPie, but Recalbox doesn't seem to want to be used by me.