@RageMaker said in CM4 and retropie with DSP disp0:

There are some errors that I don't really understands

If you post them here, we may be able to assist in fixing those or at least see if they are meaningful.

@HeineBorel Yes, the naming of the overlay is unfortunate. Note that your link is for the PIZero2W patch, for the CM4 is a separate repository, but it has the same issue (similar overlay name with an existing one, distributed by the raspberrypi-kernel package).

There are 2 workarounds for this

either rename the overlays/dpi24.dtbo file to something else and update the config.txt with the new name when updating RetroPie, skip the kernel and system packages and update only RetroPie's packages.

@mitu Heya! As an update, I got it working! Worked with a friend of mine who is a Linux expert and he walked me through it step by step, which did include the steps that you had pointed out. Thanks so much for your help!

@seatbeesate
I stand corrected, I did a fresh install again/installed safe shutdown script rebooted and seems to be working.

Going to try and reproduce to make sure maybe it was just the config.txt that got screwed up or something.

@asrfghik said in Controlling the fan on a Cm4io board with retropie:

I'm running retropie 4.8.2 on a Compute Model 4 attached to an io board. My question is if anyone knows how to control a pwm fan attached to the cm4io board within retropie. Everything I've found online only describes how to control it in pi os and not retropie specifically. Does anyone have any experience with a similar setup?

From the terminal run

sudo raspi-config

Then from the window that opened choose Performance Options > Fan

@EctoOne

Oh yeah. Will do. Thank you!

@EctoOne Yeah, I've seen that thread too. It's saying that the dock is using a unique way of wiring up the HDMI port, and that other docks besides the one it came with don't seem to work because they don't support the oddball standard RetroFlag chose. The port does work as a regular USB-C port though.

@G30FF

Thank you my friend. You saved me a bunch of wasted time. I would have had to dig deep since I did not see this documented when I read the specs.

I found this and got it installed. =)
https://www.jeffgeerling.com/blog/2020/how-flash-raspberry-pi-os-compute-module-4-emmc-usbboot

I have also resolved the issue with using a bluetooth controller for ScummVM. The write up is in the other post. In case you also need it:
https://retropie.org.uk/forum/topic/33334/scummvm-controller-help-needed

@t01mkr said in Setting up an nvme as rom storage...:

. I was wondering if it's possible to use symbolic links instead. Does anyone know?

Yes, but why ? You're already mounting your disc, why not use the right folder for it in the first place.

@kotif92 Probably not without additional configuration. Judging by the name, it's probably based on a Compute Module 4 (CM4), which implies custom hardware, hence it might need additional drivers and/or configuration. If the vendor/creator of the hardware provides instructions on how to configure it, you can use it with the RetroPie base image.

I am updating the topic to share that I actually was able to update the core Buster image to the latest kernel and both of these settings are in place. For any users that want to try NVME boot over PCI-e, I cloned the boot and root folders over to my NVME drive after doing a full update on eMMC (SD works just as well).

So I was having the same issue with my gpi case 2, what I did was I used the update feature and after a update and reboot it works perfectly.

@zera said in Display Problem with CM4 Board:

We combine CM4 and the DPI display, however, we cannot enter the emulator and it only stuck in booting. It can work normally if we change to an HDMI display.

This seems like a problem with the DPI configuration/driver. Does Raspbian Lite works normally with the configuration - does it boot to a text console/terminal ? What emulator are you starting ? By default, RetroPie boots to EmulationStation, not to an emulator.

There is also a solution that we install retropie in Raspbian image, however, it also has a problem. It will flash the desktop of Raspbian when starting, begin the game, or exit from the game.

RetroPie is based on Raspbian Lite (not the Full/Desktop), running RetroPie (EmulationStation) under a desktop env on a Pi is not a supported or tested configuration.