Airpods Pro 2 wireplumber error 24

[coolowl710]

I am having an issue connecting my Airpods Pro 2, looking for some help where to continue my search. Things I have done:

Switched edit /etc/bluetooth/main.conf to set ControllerMode = bredr. This allows me to pair the device.

Subsequently the device shows up in sound as AAC.

I try to play sound, I get the following error in `journalctl`

Dec 30 10:39:00 pop-os wireplumber[2659]: 0x5586267c3028: error 24
Dec 30 10:39:00 pop-os bluetoothd[901]: src/profile.c:ext_io_disconnected() Unable to get io data for Hands-Free Voice gateway: getpeername: Transport endpoint is not connected (107)
Dec 30 10:39:00 pop-os acpid[895]: input device has been disconnected, fd 28

Device disconnects, never having played any audio.

I have no clue where to continue. Googled for multiple days. Can't even figure out what wireplumber error 24 is supposed to mean. Does anybody have any tips what I could try next? or what error 24 means? As far as I have found it might be related to wireplumber trying to connect to pulse, but failing?

 

[coolowl710]

Fixed it by using an external Bluetooth 5.0 USB Dongle (ASUS USB-BT500). Built-in Bluetooth (Intel, BT 5.2) seems to cause the issue.

 

[martijnthe]

I've a similar problem:

- Ubuntu 22.10 + Intel Corp. Wireless-AC 9260 Bluetooth Adapter
- Airpods Pro Gen 1: work perfectly fine.
- Airpods Pro Gen 2: pairing works, but only "Hands free" profile (mono + mic) works, "Headset" profile (stereo, better quality) does not. When enabling "Headset" profile from the Audio Settings, I don't see any error logs in journalctl.

Will try a different Bluetooth dongle now...

 

[martijnthe]

I've bought the same ASUS USB-BT500 as @coolowl710, but for me it did not solve the issue.
The problem occurs as well with the other Bluetooth adapter (only "Hands free" profile (mono + mic) works, "Headset" profile (stereo, better quality) does not).
I did notice that when music is playing and I switch to "Headset" profile, I hear a very brief "blip" of audio and then it's silent.