[Bug 1903048] Re: Bluetooth won't activate on the pi 400

[Łukasz Zemczak]

Ok, I was asked to sponsor it, so I'm pushing the changes to hirsute and
groovy.

I have filled MPs for both for the bluez repo (no write access). Also, a hirsute branch needs to be opened, so the first MP is for now only targeting groovy (invalidly):
https://code.launchpad.net/~sil2100/bluez/+git/bluez/+merge/393548
https://code.launchpad.net/~sil2100/bluez/+git/bluez/+merge/393549

Cheers.

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https://bugs.launchpad.net/bugs/1903048

Title:
  [SRU] Bluetooth won't activate on the pi 400

Status in bluez package in Ubuntu:
  Confirmed

Bug description:
  The new Pi 400 has a slightly different Wifi/BT chip to the Pi4.
  Whilst wifi works happily, Bluetooth fails to operate. This doesn't
  appear to be an issue with either the firmware (the latest versions
  from upstream Raspbian have been tried), or the kernel (a known-good
  raspi kernel has been tested under Ubuntu), but with Bluez itself.
  Specifically, tracing the initialization with btmon on Raspbian and
  Ubuntu, the stack consistently fails when attempting to "Set Default
  PHY" on the latter. Curiously, under Ubuntu the adapter also appears
  to lack a MAC address.

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