No bluetooth on Bullseye Rpi Zero 2W

[Craig Lamparter]

Pi Zero 2W, install clean May Buster, bluetooth is fine, then apt-get dist-upgrade to bullseye. Bluetooth stops working in the following manner,

Linux raspberrypi 5.10.63-v7+ #1459 SMP Wed Oct 6 16:41:10 BST 2021 armv7l GNU/Linux

root@raspberrypi:~# hciconfig hci0 up
Can't init device hci0: Invalid request code (56)

root@raspberrypi:~# bluetoothctl
Agent registered
[bluetooth]# scan on
No default controller available

root@raspberrypi:~# hciconfig hci0
hci0: Type: Primary Bus: UART
BD Address: B8:27:EB:2E:21:11 ACL MTU: 1021:8 SCO MTU: 64:1
DOWN
RX bytes:1875 acl:0 sco:0 events:99 errors:0
TX bytes:1215 acl:0 sco:0 commands:99 errors:0

root@raspberrypi:~# cat /var/log/syslog | grep help
Nov 7 18:29:39 raspberrypi systemd[1]: Starting Raspberry Pi bluetooth helper...
Nov 7 18:29:39 raspberrypi bthelper[405]: Can't init device hci0: Invalid request code (56)
Nov 7 18:29:39 raspberrypi systemd[1]: <email address hidden>: Main process exited, code=exited, status=1/FAILURE
Nov 7 18:29:39 raspberrypi systemd[1]: <email address hidden>: Failed with result 'exit-code'.
Nov 7 18:29:39 raspberrypi systemd[1]: Failed to start Raspberry Pi bluetooth helper.

I'm stumped, but here to help in any way (linux systems software engineer, just not a bluetooth person)

thanks,
-craig

[Craig Lamparter (craigerl)]

Additionally, The problem is not observed on a Pi3 nor Pi4.

[Craig Lamparter (craigerl)]

..and with the release of Bullseye being official, the problem is fixed.

disregard, and thanks.