Raspberry Pi 4 (8GB)

Ubuntu 20.04 (booting from USB, no SD card)

My green LED is constantly on, but everything seems to be running fine. I initially thought it may be because I'm seeding with Deluge, but when I stopped seeding the green LED still remains on. It's constantly solid and only blinks once every minute or two for 1-2 seconds and then returns to solid green.

Here are the Docker containers that I'm running:

  • Bazarr
  • Bitwarden
  • Deluge
  • Jackett
  • Jellyfin
  • Komga
  • Nextcloud
  • MariaDB
  • Redis
  • Portainer
  • Radarr
  • Sonarr
  • Traefik
  • Watchtower
  • Wireguard
  • blinks once every minute or two for 1-2 seconds ... so, the LED is not always on
    – jsotola
    Mar 30, 2021 at 5:25
  • Unless you have changed the board led configuration (you can change what the green led means by a setting in config.txt) I would assume that your Pi is just overloaded and therefore constantly accesses the drive. I'm not sure what the LED does when no SD card is in the slot, though.
    – PMF
    Mar 30, 2021 at 6:35

1 Answer 1


I do not think you've not supplied enough information to answer the question you've asked. Consequently, all you're likely to get for it is opinions; here's mine:

  • Do some more research

  • Recall the flicker fusion threshold, and recognize that you can't tell the difference between constantly on and a light that is turning on and off at a rate above the threshold.

  • Understand that all of ]that software you've brought on board may be controlling the green led](https://www.heelpbook.net/2021/raspberry-pi-controlling-pwr-and-act-leds-red-and-green-leds/); i.e. use the process of elimination for each of your apps.

  • Check /etc/fstab (or wherever Ubuntu stores this information) to see how your USB is mounted. Look for the line where your root filesystem / is mounted. If you don't see the noatime option, you may try adding it - perhaps like so:

PARTUUID=7f4939b6-02  /               ext4    defaults,noatime  0       1

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