Bug#1017977: Fails to load intel/ibt-20-1-3.sfi

[Olaf Meeuwissen <paddy-hack@member.fsf.org>]

Upgrading the firmware-iwlwifi package last week (2022-11-27) from
20221012-1 to 20221109-2 fixed the issue for linux-image-6.0.0-4-amd64
6.0.8-1.  The changelog for 20221109-1 mentioned

  * iwlwifi: update firmware files for Intel Bluetooth AX2*
  * iwlwifi: Add Intel Wireless AX211 Bluethooth firmware and
    configuration (Closes: #1023245)

which may be related to fixing it for my

  Intel Corporation Wi-Fi 6 AX200 (rev 1a)

However, upgrading today (2022-12-04) to linux-image-6.0.0-5-amd64
6.0.10-1 reintroduced it.

Cold booting into 6.0.0-4 I have a working Bluetooth-only keyboard.
Rebooting from that into 6.0.0-5 my keyboard remains functional.
Cold booting into 6.0.0-5 my Bluetooth-only keyboard is unresponsive.

For both 6.0.0-5 boot scenarios, dmesg --level=err includes

  bluetooth hci0: firmware: failed to load intel/ibt-20-1-3.sfi (-2)

Twice, actually, about 10 microseconds apart.

For 6.0.0-4 there is no such error message.

Hope this helps,
--
Olaf Meeuwissen