PCI-e Coral TPU not recognized (possibly proxmox related?)

Describe the bug Since USB corals are out of stock everywhere, I got a M.2 PCIe version. It is detected in proxmox, I passed it through to the VM, but Frigate doesnt seem to detect it and the detector crashes.

Version of frigate 1.13

Config file relevant part:

  coral:
    type: edgetpu
    device: pci 

Frigate container logs

detector.coral                 INFO    : Starting detection process: 34
frigate.edgetpu                INFO    : Attempting to load TPU as pci
frigate.edgetpu                INFO    : No EdgeTPU detected.
Process detector:coral:
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/tflite_runtime/interpreter.py", line 152, in load_delegate
    delegate = Delegate(library, options)
  File "/usr/local/lib/python3.8/dist-packages/tflite_runtime/interpreter.py", line 111, in __init__
    raise ValueError(capture.message)
ValueError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/lib/python3.8/multiprocessing/process.py", line 315, in _bootstrap
    self.run()
  File "/usr/lib/python3.8/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/opt/frigate/frigate/edgetpu.py", line 124, in run_detector
    object_detector = LocalObjectDetector(tf_device=tf_device, num_threads=num_threads)
  File "/opt/frigate/frigate/edgetpu.py", line 63, in __init__
    edge_tpu_delegate = load_delegate('libedgetpu.so.1.0', device_config)
  File "/usr/local/lib/python3.8/dist-packages/tflite_runtime/interpreter.py", line 154, in load_delegate
    raise ValueError('Failed to load delegate from {}\n{}'.format(
ValueError: Failed to load delegate from libedgetpu.so.1.0
frigate.mqtt                   INFO    : MQTT connected
frigate.watchdog               INFO    : Detection appears to have stopped. Exiting frigate...

Computer Hardware

• OS: proxmox
• Install method: Addon
• Virtualization: Proxmox
• Coral Version: PCIe
• Network Setup: wired

Additional context Proxmox did detect the coral card, but did not offer to pass through the PCIe device from the GUI. I had to manually add it in the VM config file, and I have no way of knowing 100% certain if that worked. More details here: https://www.reddit.com/r/Proxmox/comments/mo7f99/trouble_passing_through_pcie_device_coral/gu7ge1g/

[nayneyT]

I can confirm that the driver is now present in v6.0rc1 of HAOS https://www.reddit.com/r/Proxmox/comments/n7nfem/proxmox_hassos_frigate_google_coral_tpu/

[R5fan]

I just saw this being posted on reddit: https://www.reddit.com/r/Proxmox/comments/n34f8q/proxmox_vm_ubuntu_2004_frigate_2x_google_coral_tpu/

Someone managed to get it working on proxmox, but in a ubuntu VM running a frigate container, and using a M2 to PCIe adapter (My x86 box happens to have the right M.2 slot for my m2 coral and no other PCIe slots anyhow).

Best I can tell, the instructions are essentially the same ones I already followed, aside from an extra line in blacklist-apex.conf options vfio-pci ids=1ac1:089a and using a qm command to pass through the PCIe card instead of editing the conf file in pve. I didnt expect either to make a difference and it doesnt seem to.

I havent tried it again using an ubuntu VM instead of HA OS, I dont expect it to work any better than my last attempt, but I have no idea why.