[Bug 213829] Intel AX210 Bluetooth controller doesn't start from warm boot

https://bugzilla.kernel.org/show_bug.cgi?id=213829

--- Comment #27 from Marco (rodomar705@protonmail.com) ---

(In reply to Guillaume Binet from comment #26)

Alright, talking with Intel directly, this patch seems to fix it for 5.15.2:

https://patchwork.kernel.org/project/bluetooth/patch/20211013080511.23945-1-
kiran.k@intel.com/

I have a bunch of other regressions like GPU hangs with 5.15 but at least I
see the controller showing up consistently warm reboot after warm reboot.

Can anyone else confirm it works?

Nope, running 5.15.2 and now bluetooth disappears after a reboot. This hasn't
fixed the problem for me, it just changed behaviour.

I can confirm that the patch is present, I do see the message added for that
patch:

...
[ 2470.756299] Bluetooth: hci0: Timed out waiting for suspend events
[ 2470.756315] Bluetooth: hci0: Suspend timeout bit: 6
[ 2470.756345] Bluetooth: hci0: Suspend notifier action (3) failed: -110
[13556.607173] Bluetooth: hci0: Firmware timestamp 2021.39 buildtype 1 build
31878
[13556.611182] Bluetooth: hci0: No device address configured
[13556.611197] Bluetooth: hci0: Found device firmware: intel/ibt-0041-0041.sfi
[13556.611306] Bluetooth: hci0: Boot Address: 0x100800
[13556.611308] Bluetooth: hci0: Firmware Version: 134-39.21
[13556.611310] Bluetooth: hci0: Firmware already loaded
...

But there is no bluetooth adapter available from both my DE nor from
bluetoothctl info command.

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