Using Luxonis preped RPI OS images (V10)

jakaskerl

legow00
Hmm. What do you get if you try to open a device using dai.Device()? Like running a simple rgb_preview example? I'm interested in the dmesg output when you run the script. Perhaps a if you run it using XLINK_LEVEL=debug and post the results. This is very strange, can't remember seeing it before.

Thanks,
Jaka

legow00

@jakaskerl

I tried to run the RGB Preview (https://docs.luxonis.com/software/depthai/examples/rgb_preview/) and the Python script retured:

Traceback (most recent call last):

File "/home/pi/Desktop/rgb_preview.py", line 24, in <module>

with dai.Device(pipeline) as device:

^^^^^^^^^^^^^^^^^^^^

RuntimeError: No available devices

The output of dmesg can be found here: https://pastebin.com/6kYZ7QXp

Setting XLINK_LEVEL=debug flag results in the same output as above

I just checked my DepthAI Python version and I am at version 2.22.0.0, should I update to the most recent package in pip? Version 2.30.0.0.

jakaskerl

legow00
Dmesg shows no indication that the HW detects the USB device.

Let me check what's broken upon update & I'll get back to you.

Thanks,
Jaka

jakaskerl

legow00 legow00
Tried on a CM4 POE with x64 image (V10 I think).

   12  sudo apt update && sudo apt -y upgrade
   13  lsusb
   14  cat /etc/os-release
   15  sudo apt autoremove
   16  sudo reboot
   17  lsusb
   18  sudo apt autoremove

"lsusb" still shows the device is connected.

Can you try running systemctl status cm4-rvc2-usb-prepare? Enable if disabled.

Thanks,
Jaka

legow00

@jakaskerl

I checked systemctl status cm4-rvc2-usb-prepare but this systemd service is enabled and active.

I also tried the same commands as you mentioned:

12 sudo apt update && sudo apt -y upgrade 13 lsusb 14 cat /etc/os-release 15 sudo apt autoremove 16 sudo reboot 17 lsusb 18 sudo apt autoremove

Nothing changed lsusb still returns:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

jakaskerl

legow00
Hmm, does it work if you try to reflash a fresh POE v10 image? Can you try re-seating the SOM:

also check:

pi@luxonis:~ $ ls /lib/firmware/renesas/
K2026.mem

pi@luxonis:~ $ ls /usr/sbin | grep upd72020x
rvc2-upd72020x-check-and-init
upd72020x-load

Thanks,
Jaka

legow00

@jakaskerl

I executed the following commands on a fresh V10 image install:

12 sudo apt update && sudo apt -y upgrade
13 lsusb
14 cat /etc/os-release
15 sudo apt autoremove
16 sudo reboot
17 lsusb
18 sudo apt autoremove

Still same result as before, lsusb still returns:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

What would be the best practice to remove the SOM while minimizing the risk of damaging the connectors?

legow00

@jakaskerl

I re-seated the SOM and started again with a fresh install of th V10 image.

I did multiple sudo apt update && sudo apt -y upgrade, sudo apt autoremove and reboot.

The Intel Movidius MyriadX USB device is still detected. RGB example scripts also works!

Thanks for your help @jakaskerl ! It was probably a loose or bad connections somewhere in the SOM connectors.

legow00

@jakaskerl

Oops seems like I celebrated to early… after some reboots a pop up in the top right part of the screen showed which notified me of few updates. After these updates the Movidius device was gone again… grrrrr. Is there a way to look at a log file of the last updates executed on this system?

jakaskerl

legow00
/var/log/apt/history.log and /var/log/apt/term.log
should have your apt history

eg:

sudo awk '/Start-Date/{p=1} p' /var/log/apt/history.log | tail -n 50

Thanks,
Jaka

legow00

@jakaskerl

One (or both?) of these packages broke the USB communication with the Movidius device:

Start-Date: 2025-05-08 14:05:22

Commandline: packagekit role='update-packages'

Requested-By: pi (1000)

Upgrade: rpi-eeprom:arm64 (27.6-1, 27.7-1), piwiz:arm64 (0.90, 0.91)

End-Date: 2025-05-08 14:05:27

What would be my best course of action?

jakaskerl

legow00
Try with
sudo ln -sf renesas/K2026.mem /lib/firmware/renesas_usb_fw.mem, then
echo -n 0000:01:00.0 | sudo tee /sys/bus/pci/drivers/xhci-pci-renesas/bind. I was able to rebind mine and then it started working again.

Thanks,
Jaka

legow00

@jakaskerl

Thanks! I was also able to rebind it! Could this be updated in the next release of a new image? So that other people in the future don't have this same problem.

Thanks for your ongoing support, I will try this out for a week before updating our other cameras just to be sure.

I hope this was the root cause of my problems. 🙂

jakaskerl

legow00
I still have to check why that happens - then I'll add it to the image.

Thanks for confirming the fix.

Regards,
Jaka