[Support]: Coral disconnects

[StarMonkey1]

Checklist

• I have updated to the latest available Frigate version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in incognito mode to rule out problems with any third party extensions or plugins I have installed.
• I have asked the AI at https://docs.frigate.video about my issue.

Describe the problem you are having

For context this is a docker install running on a physical machine, this is not a Home Assistant Add-on (seen similar issues with HA add-ons). Frigate was running reliably on 16 and 16.1, running Coral as a USB TPU.

Every day or two with 16.2 Frigate crashes, it looks like its failing to detect the TPU.

Rebooting Frigate doesn't help, rebooting the physical host temporarily fixes it,

Steps to reproduce

Reboot the physical client.
Wait 24-48 hours.
All camera feeds down, webUI difficult to view due to restarts

Version

16.2

In which browser(s) are you experiencing the issue with?

Chrome 141.0.7390.125, Chrome for Android

Frigate config file

#logger:
#  logs:
#    frigate.record.maintainer: debug

mqtt:
  enabled: true
  host: 192.168.1.10
  port: 1883
  user: frigate_mqtt
  password: passwordhere

detectors:
  coral:
    type: edgetpu
    device: usb

snapshots:
  enabled: true
  timestamp: true

lpr:
  enabled: true
  device: CPU
  min_plate_length: 2
  known_plates:
   ###

cameras:
  Back_Garden:
    lpr:
      enabled: false
    ffmpeg:
      hwaccel_args: preset-vaapi
      inputs:
        - path: 
            rtsp://user:[email protected]:554/Streaming/channels/101
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/Back_Garden
          roles:
            - detect
    live:
      streams:
        Back_Garden: Back_Garden
    record:
      enabled: true
      alerts:
        pre_capture: 15
        post_capture: 15
      detections:
        pre_capture: 15
        post_capture: 15
    detect:
      width: 1080
      height: 720
      fps: 5
    objects:
      track:
        - person
        - dog
        - cat
        - bicycle
        - car
        - motorcycle
        - horse
      filters:
        person:
          min_area: 1500
          mask: 0.608,0.205,0.712,0.227,0.716,0.063,0.61,0.048
        car:
          min_area: 800
        motorcycle: {}
    review:
      alerts:
        labels:
          - person
          - bicyle
          - motorcycle
          - horse
    ui:
      order: 0

    motion:
      mask: 
        0.749,0.379,0.735,0.242,0.765,0.169,0.786,0.135,0.853,0.128,0.88,0.136,0.922,0.209,0.965,0.337,0.995,0.414,0.974,0.529,0.952,0.646,0.937,0.758,0.92,0.813,0.856,0.821,0.835,0.867,0.794,0.874,0.742,0.861,0.698,0.832,0.699,0.759,0.707,0.676,0.707,0.604,0.704,0.553,0.697,0.505,0.692,0.481,0.711,0.46,0.719,0.439,0.727,0.418
  Front_Garden:
    ffmpeg:
      hwaccel_args: preset-vaapi
      inputs:
        - path: 
            rtsp://user:[email protected]:554/Streaming/channels/101
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/Front_Garden
          roles:
            - detect
    live:
      streams:
        Front_Garden: Front_Garden
    record:
      enabled: true
      alerts:
        pre_capture: 15
        post_capture: 15
      detections:
        pre_capture: 15
        post_capture: 15
    detect:
      width: 1080
      height: 720
      fps: 5
    objects:
      track:
        - person
        - dog
        - cat
        - bicycle
        - car
        - motorcycle
        - horse
      filters:
        person:
          min_area: 1000
        car:
          min_area: 600
          mask:
            - 0.819,0.609,0.804,0.718,0.811,0.773,0.701,1,1,1,0.99,0.907,0.95,0.866,0.99,0.613,0.888,0.556,0.858,0.594,0.842,0.586
            - 0.251,0.162,0.256,0.298,0.48,0.246,0.542,0.241,0.543,0.149
        motorcycle: {}
    review:
      alerts:
        labels:
          - person
          - car
          - bicyle
          - motorcycle
          - horse
    ui:
      order: 1

    motion:
      threshold: 40
      contour_area: 30
      improve_contrast: true
      mask:
        - 0.061,1,0.061,0.975,0.078,0.995,0.081,0.98,0.071,0.961,0.07,0.941,0.076,0.93,0.06,0.892,0.065,0.88,0.077,0.873,0.096,0.866,0.118,0.872,0.135,0.867,0.16,0.857,0.166,0.835,0.167,0.797,0.155,0.736,0.182,0.784,0.199,0.781,0.22,0.774,0.218,0.734,0.227,0.697,0.248,0.564,0.189,0.537,0.148,0.553,0.107,0.544,0.117,0.513,0.144,0.523,0.152,0.501,0.136,0.461,0.159,0.422,0.141,0.395,0.122,0.364,0.081,0.367,0.074,0.36,0.079,0.31,0.1,0.299,0.122,0.322,0.151,0.352,0.171,0.282,0.239,0.328,0.245,0.226,0.192,0.091,0.186,0.068,0.183,0.028,0.187,0,0,0,0,1
        - 0.21,0,0.211,0.07,0.257,0.129,0.291,0.086,0.35,0.074,0.401,0.102,0.402,0.082,0.441,0.048,0.442,0
  Roof_Overhang:
    lpr:
      enabled: false
    ffmpeg:
      hwaccel_args: preset-vaapi
      inputs:
        - path: 
            rtsp://user:[email protected]:554/Streaming/channels/101
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/Roof_Overhang
          roles:
            - detect
    live:
      streams:
        Roof_Overhang: Roof_Overhang
    record:
      enabled: true
      alerts:
        pre_capture: 15
        post_capture: 15
      detections:
        pre_capture: 15
        post_capture: 15
    detect:
      width: 1080
      height: 720
      fps: 5
    objects:
      track:
        - person
        - dog
        - cat
      filters:
        person:
          min_area: 2000
        car:
          min_area: 25000
    review:
      alerts:
        labels:
          - person
          - car
          - bicyle
          - motorcycle
          - horse
    ui:
      order: 2

  Office_External:
    enabled: true
    ffmpeg:
      hwaccel_args: preset-vaapi
      inputs:
        - path: 
            rtsp://user:[email protected]:554/Streaming/channels/101
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/Office_External
          roles:
            - detect
    live:
      streams:
        Office_External: Office_External
    record:
      enabled: true
      alerts:
        pre_capture: 15
        post_capture: 15
      detections:
        pre_capture: 15
        post_capture: 15
    detect:
      width: 1080
      height: 720
      fps: 5
    objects:
      track:
        - person
        - dog
        - bird
        - cat
        - bicycle
        - car
        - motorcyle
        - horse
      filters:
        person:
          min_area: 1000
          mask: 0.336,0.191,0.336,0.327,0.446,0.303,0.441,0.2
        car:
          min_area: 600
    review:
      alerts:
        labels:
          - person
          - car
          - bicyle
          - motorcycle
          - horse
    ui:
      order: 3

  Garage:
    enabled: false
    ffmpeg:
      hwaccel_args: preset-vaapi
      inputs:
        - path: rtsp://user:[email protected]/av_stream/ch0
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/Garage
          roles:
            - detect
    live:
      streams:
        Garage: Garage
    record:
      enabled: true
      alerts:
        pre_capture: 15
        post_capture: 15
      detections:
        pre_capture: 15
        post_capture: 15
    detect:
      width: 1080
      height: 720
      fps: 5
    objects:
      track:
        - person
        - dog
        - cat
        - bicycle
        - motorcycle
        - horse
      filters:
        person:
          min_area: 7500
    review:
      alerts:
        labels:
          - person
          - car
          - bicyle
          - motorcycle
          - horse
    ui:
      order: 4

  Back_Door:
    lpr:
      enabled: false
    enabled: true
    ffmpeg:
      hwaccel_args: preset-vaapi
      inputs:
        - path: 
            rtsp://user:[email protected]/user=admin_password=admin_channel=1_stream=0.sdp?real_stream?tcp
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/Back_Door
          roles:
            - detect
    live:
      streams:
        Back_Door: Back_Door
    objects:
      track:
        - person
        - bicycle
      filters:
        person:
          mask: 
            0.527,0.799,0.529,0.972,0.697,0.972,0.75,0.895,0.75,0.858,0.689,0.848,0.625,0.789
    record:
      enabled: true
      alerts:
        pre_capture: 15
        post_capture: 15
      detections:
        pre_capture: 15
        post_capture: 15
    detect:
      width: 1280
      height: 720
      fps: 5
    review:
      alerts:
        labels:
          - person
          - car
          - bicyle
          - motorcycle
          - horse
    ui:
      order: 5

    motion:
      threshold: 30
      contour_area: 10
      improve_contrast: true

record:
  enabled: true
  retain:
    days: 10
    mode: all
  alerts:
    retain:
      days: 30
      mode: motion
  detections:
    retain:
      days: 30
      mode: motion
  #sync_recordings: True

go2rtc:
  streams:
    Back_Garden:
      - rtsp://user:[email protected]:554/Streaming/channels/101
    Front_Garden:
      - rtsp://user:[email protected]:554/Streaming/channels/101
    Office_External:
      - rtsp://user:[email protected]:554/Streaming/channels/101
    Roof_Overhang:
      - rtsp://user:[email protected]:554/Streaming/channels/101
    Garage:
      - rtsp://user:[email protected]/av_stream/ch0
    Back_Door:
    #  - rtsp://user:[email protected]/av_stream/ch0
      - rtsp://user:[email protected]/user=admin_password=admin_channel=1_stream=0.sdp?real_stream?tcp
    #Back_Door_Rotated:
    #  - "ffmpeg:Back_Door#video=h264#rotate=90#hardware=vaapi"

  webrtc:
    candidates:
      - 192.168.1.4:8555
      - stun:8555
version: 0.16-0
detect:
  enabled: true

docker-compose file or Docker CLI command

version: "3.9"
services:
  frigate:
    container_name: frigate
    privileged: true # this may not be necessary for all setups
    restart: unless-stopped
    stop_grace_period: 30s
    image: ghcr.io/blakeblackshear/frigate:stable
    shm_size: "800mb" # update for your cameras based on calculation above
    devices:
      - /dev/bus/usb:/dev/bus/usb # passes the USB Coral, needs to be modified for other versions
      - /dev/dri/renderD128:/dev/dri/renderD128 # for intel hwaccel, needs to be updated for your hardware
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /home/nick/frigate/config:/config/
      - /mnt/truenas_frigate/media:/media/frigate
      - type: tmpfs # Optional: 1GB of memory, reduces SSD/SD Card wear
        target: /tmp/cache
        tmpfs:
          size: 2000000000
    ports:
      - "8971:8971"
      - "5000:5000" # Internal unauthenticated access. Expose carefully.
      - "8554:8554" # RTSP feeds
      - "8555:8555/tcp" # WebRTC over tcp
      - "8555:8555/udp" # WebRTC over udp
    environment:
      FRIGATE_RTSP_PASSWORD: "passwordhere"
      LIBVA_DRIVER_NAME: i965

Relevant Frigate log output

2025-11-04 21:40:47.018909248  [INFO] Preparing Frigate...
2025-11-04 21:40:47.944780267  [INFO] Starting Frigate...
2025-11-04 21:40:52.409388836  [2025-11-04 21:40:52] frigate.util.config            INFO    : Checking if frigate config needs migration...
2025-11-04 21:40:52.753374152  [2025-11-04 21:40:52] frigate.util.config            INFO    : frigate config does not need migration...
2025-11-04 21:40:53.198917404  [2025-11-04 21:40:53] frigate.util.services          INFO    : Automatically detected vaapi hwaccel for video decoding
2025-11-04 21:40:53.235907129  [2025-11-04 21:40:53] frigate.config.config          WARNING : Office_External is configured to track ['motorcyle'] objects, which are not supported by the current model.
2025-11-04 21:40:53.246805318  [2025-11-04 21:40:53] frigate.app                    INFO    : Starting Frigate (0.16.2-4d58206)
2025-11-04 21:40:53.288355531  [2025-11-04 21:40:53] peewee_migrate.logs            INFO    : Starting migrations
2025-11-04 21:40:53.293746796  [2025-11-04 21:40:53] peewee_migrate.logs            INFO    : There is nothing to migrate
2025-11-04 21:40:53.310113063  [2025-11-04 21:40:53] frigate.app                    INFO    : Recording process started: 443
2025-11-04 21:40:53.326125845  [2025-11-04 21:40:53] frigate.app                    INFO    : Review process started: 455
2025-11-04 21:40:53.332896138  [2025-11-04 21:40:53] frigate.app                    INFO    : go2rtc process pid: 122
2025-11-04 21:40:53.368952168  [2025-11-04 21:40:53] detector.coral                 INFO    : Starting detection process: 467
2025-11-04 21:40:53.370101938  [2025-11-04 21:40:53] frigate.detectors.plugins.edgetpu_tfl INFO    : Attempting to load TPU as usb
2025-11-04 21:40:53.374481490  [2025-11-04 21:40:53] frigate.app                    INFO    : Embedding process started: 470
2025-11-04 21:40:53.420992608  [2025-11-04 21:40:53] frigate.app                    INFO    : Output process started: 512
2025-11-04 21:40:53.615769613  [2025-11-04 21:40:53] frigate.app                    INFO    : Camera processor started for Back_Garden: 579
2025-11-04 21:40:53.638870494  [2025-11-04 21:40:53] frigate.app                    INFO    : Camera processor started for Front_Garden: 581
2025-11-04 21:40:53.675528514  [2025-11-04 21:40:53] frigate.app                    INFO    : Camera processor started for Roof_Overhang: 586
2025-11-04 21:40:53.700448037  [2025-11-04 21:40:53] frigate.app                    INFO    : Camera processor started for Office_External: 597
2025-11-04 21:40:53.701969264  [2025-11-04 21:40:53] frigate.app                    INFO    : Camera processor not started for disabled camera Garage
2025-11-04 21:40:53.731228468  [2025-11-04 21:40:53] frigate.app                    INFO    : Camera processor started for Back_Door: 617
2025-11-04 21:40:53.780656369  [2025-11-04 21:40:53] frigate.app                    INFO    : Capture process started for Back_Garden: 630
2025-11-04 21:40:53.803809963  [2025-11-04 21:40:53] frigate.app                    INFO    : Capture process started for Front_Garden: 634
2025-11-04 21:40:53.856221797  [2025-11-04 21:40:53] frigate.app                    INFO    : Capture process started for Roof_Overhang: 659
2025-11-04 21:40:53.879569806  [2025-11-04 21:40:53] frigate.app                    INFO    : Capture process started for Office_External: 667
2025-11-04 21:40:53.880919789  [2025-11-04 21:40:53] frigate.app                    INFO    : Capture process not started for disabled camera Garage
2025-11-04 21:40:53.912112633  [2025-11-04 21:40:53] frigate.app                    INFO    : Capture process started for Back_Door: 675
2025-11-04 21:40:54.437071462  [2025-11-04 21:40:54] frigate.api.fastapi_app        INFO    : Starting FastAPI app
2025-11-04 21:40:55.408628443  [2025-11-04 21:40:55] frigate.api.fastapi_app        INFO    : FastAPI started
2025-11-04 21:40:59.378074308  [2025-11-04 21:40:59] frigate.detectors.plugins.edgetpu_tfl ERROR   : No EdgeTPU was detected. If you do not have a Coral device yet, you must configure CPU detectors.
2025-11-04 21:40:59.384941111  Process detector:coral:
2025-11-04 21:40:59.384947865  Traceback (most recent call last):
2025-11-04 21:40:59.384951101    File "/usr/local/lib/python3.11/dist-packages/tflite_runtime/interpreter.py", line 166, in load_delegate
2025-11-04 21:40:59.384958348      delegate = Delegate(library, options)
2025-11-04 21:40:59.384961059                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-11-04 21:40:59.384964352    File "/usr/local/lib/python3.11/dist-packages/tflite_runtime/interpreter.py", line 104, in __init__
2025-11-04 21:40:59.384987945      raise ValueError(capture.message)
2025-11-04 21:40:59.384990076  ValueError
2025-11-04 21:40:59.519952  2025-11-04 21:40:59.384992064
2025-11-04 21:40:59.384994484  During handling of the above exception, another exception occurred:
2025-11-04 21:40:59.520004  2025-11-04 21:40:59.384995833
2025-11-04 21:40:59.384997589  Traceback (most recent call last):
2025-11-04 21:40:59.385000149    File "/usr/lib/python3.11/multiprocessing/process.py", line 314, in _bootstrap
2025-11-04 21:40:59.385029078      self.run()
2025-11-04 21:40:59.385032167    File "/opt/frigate/frigate/util/process.py", line 41, in run_wrapper
2025-11-04 21:40:59.385034115      return run(*args, **kwargs)
2025-11-04 21:40:59.385035867             ^^^^^^^^^^^^^^^^^^^^
2025-11-04 21:40:59.385038342    File "/usr/lib/python3.11/multiprocessing/process.py", line 108, in run
2025-11-04 21:40:59.385056196      self._target(*self._args, **self._kwargs)
2025-11-04 21:40:59.385059420    File "/opt/frigate/frigate/object_detection/base.py", line 112, in run_detector
2025-11-04 21:40:59.385062212      object_detector = LocalObjectDetector(detector_config=detector_config)
2025-11-04 21:40:59.385064636                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-11-04 21:40:59.385067627    File "/opt/frigate/frigate/object_detection/base.py", line 57, in __init__
2025-11-04 21:40:59.385069840      self.detect_api = create_detector(detector_config)
2025-11-04 21:40:59.385071950                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-11-04 21:40:59.385095257    File "/opt/frigate/frigate/detectors/__init__.py", line 18, in create_detector
2025-11-04 21:40:59.385097675      return api(detector_config)
2025-11-04 21:40:59.385099368             ^^^^^^^^^^^^^^^^^^^^
2025-11-04 21:40:59.385101988    File "/opt/frigate/frigate/detectors/plugins/edgetpu_tfl.py", line 42, in __init__
2025-11-04 21:40:59.385105396      edge_tpu_delegate = load_delegate("libedgetpu.so.1.0", device_config)
2025-11-04 21:40:59.385107923                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-11-04 21:40:59.385110899    File "/usr/local/lib/python3.11/dist-packages/tflite_runtime/interpreter.py", line 168, in load_delegate
2025-11-04 21:40:59.385137979      raise ValueError('Failed to load delegate from {}\n{}'.format(
2025-11-04 21:40:59.385140807  ValueError: Failed to load delegate from libedgetpu.so.1.0
2025-11-04 21:40:59.520042  2025-11-04 21:40:59.385142004

Relevant go2rtc log output

Can't see these due to the constant reboots during the crash.

Operating system

Other Linux

Install method

Docker Compose

Network connection

Wired

Camera make and model

Hikvision mainly

Screenshots of the Frigate UI's System metrics pages

Not accessible during the crash

Any other information that may be helpful

lsusb shows the Coral

[inkeep-ai-assistant[bot]]

Based on the error logs, Frigate is failing to detect your USB Coral TPU after 24-48 hours of operation. The error No EdgeTPU was detected and Failed to load delegate from libedgetpu.so.1.0 indicates the Coral is no longer being recognized by the system(1).

Common USB Coral Detection Issues

Several factors can cause USB Coral detection to fail:

Power Issues

The USB Coral can draw up to 900mA, which may be too much for some USB ports(1). Try these steps:

1. Try a different USB port - some ports provide more power than others(1)
2. Ensure you're using a USB3 port for both power and maximum speed(1)
3. Try a different cable - some users have found the included cable causes intermittent issues(1)
4. Use an externally powered USB hub(1)

Device Access in Docker

When running Frigate in Docker, you must ensure both device IDs are mapped (the Coral has different IDs when uninitialized vs initialized)(1). Your current configuration maps /dev/bus/usb:/dev/bus/usb, which should be sufficient(2).

Cable Quality

Some users have reported that switching from the included cable to a different one fixed intermittent detection issues entirely(1).

Recommended Actions

1. Check physical connections - Since a host reboot temporarily fixes the issue, this points to a hardware/power stability problem rather than a Frigate configuration issue
2. Monitor USB power - Use lsusb to verify the Coral appears as 1a6e:089a Global Unichip Corp. before Frigate runs an inference(1)
3. Try an externally powered USB hub - This is particularly important if you're running multiple USB devices(3)
4. Test different cables - Replace the USB cable with a high-quality USB3 cable

Since the issue started with version 0.16.2 and wasn't present in 0.16.0/0.16.1, you may also want to check the Frigate release notes for any changes related to EdgeTPU detection between these versions.

📚 Sources:

1. Troubleshooting EdgeTPU
2. Installation
3. Recommended hardware

---

Have another question? Just tag @inkeep.

[StarMonkey1]

I think this is due to my NAS storage being full.

I have a 100gb local disk and 4TB of NAS disk presented. Disk space usage in Frigate shows:

du -sh on the media/recordings folder within the /mnt that is the NAS drive shows 4.0TB.

I'm not sure why the recordings folder size doesn't tie up with the Frigate UI in this case?

[StarMonkey1]

A reboot of the physical host has brought Frigate back up but with even stranger disk usage, du -sh is still showing a 4.0TB recordings directory.

[StarMonkey1]

sync recordings seems to have brought the usage to something realistic. Now I'll wait for another crash.