Bluetooth adapter requires system power cycle on RPi 400

Hardware
1

I have a Raspberry Pi 400 I have been using for a while as my Home Assistant host. Recently, I have been experiencing more frequent “Bluetooth adapter requires system power cycle” messages, indicating that the built-in Bluetooth adapter is stuck in passive mode.

I have done several power cycles as suggested, and it usually goes a week or more without any problems.

Is there anything else I can do to try to permanently resolve the issue?

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2
  • Maybe get rid of the PI?
  • Add a different Bluetooth dongle
  • Use espHome BT Proxy instead?
3

Do I need to do both steps if I want to keep my Pi?

  • Add a different Bluetooth dongle
  • Use espHome BT Proxy instead?

If so, do you recommend an alternative USB dongle?
How do I set up an espHome BT proxy?

4

Pick one of them.

5

Ok thanks if I pick espHome BT Proxy, I will continue to use the Bluetooth chip in my current Pi?

I have ESPHome already installed to control some sensors. How do I set up the ESPHome BT Proxy? Do I just run the generic install from: Ready-Made Projects - ESPHome - Smart Home Made Simple ?

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6

I am experiencing the same on a Raspberry Pi 4 Model B Rev 1.5 (8Gb) running HA OS. Seems to have stared to happen recently. Maybe caused by a recent change?

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7

Same here on RPi 5, pretty annoying issue. I hope will be fixed soon.

8

Same issue here on Pi 5. Luckily I don’t have any bluetooth based sensors otherwise it would have been very bad.

9

Same here on Pi5 as well. It seems to have started after a recent update

10

Same. Pi 5 BT failures recently.

The Bluetooth adapter hci0 (xx:xx:xx:xx:xx:xx) (bcm43438-bt) is stuck in passive scanning mode despite requesting active scanning mode. Automatic recovery was attempted but failed. This is likely a kernel, firmware, or operating system issue, and the system requires a complete power cycle to recover the adapter.

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11

I’m also having this problem on my pi 4b. Definitely started in the last few months.

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12

Raspberry Pi 4 user here. I noticed the same thing over the last couple of months. My bluetooth sensors seem to be working fine so it might not be that much of an issue. It’s just that the notification is annoying…

13

Same here on an RPI4. Power cycles last a week at most before I have to do it again.

14

I found an issue on this for HAOS. For me, I don’t have any bluetooth devices so it’s just annoying.

15

Same here on rpi5. I get this error every day. The problem is that it blocks everything and I can’t log in anymore. It’s starting to become a problem.

16

This error reoccurs every few days on my Raspberry Pi 5. I hadn’t considered that this could be a software issue—I had assumed my hardware was failing somehow.

I started seeing repairs in maybe October or November 2025, which makes me wonder if it’s not the same as #3211 (linked above by @deviantintegral). Or is the repair new, and the issue was happening the whole time?

17

RPi5 here with the same issue for a while now, too.

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18

pi 3b+ also same issues.

The suggested lines for my dockercompose don’t solve this issue.

cap_add:
  - NET_ADMIN
  - NET_RAW
volumes:
  - /run/dbus:/run/dbus:ro