Comment 96 for bug 1859592

Same Hardware, same bug.

I remember this used to work in the past, but I didn't use Bluethooth for about a year. (on an ASRock X570 Taichi)

$ uname -a
Linux workstation 6.5.0-17-generic #17~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jan 16 14:32:32 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

$ lspci -k -s 05:00.0
05:00.0 Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a)
 Subsystem: Intel Corporation Wi-Fi 6 AX200NGW
 Kernel driver in use: iwlwifi
 Kernel modules: iwlwifi

That mentioned workaround works for me as well:

$ sudo rmmod btusb
$ sudo modprobe btusb

While trying to fix this myself, I found that the following steps made Bluetooth available again without (cold) power cycling:

1. reboot into EFI
2. disable Bluetooth
3. boot to OS (Linux Mint 21.2)
4. reboot into EFI
5. enable Bluetooth
6. boot to OS

Maybe this helps to get more ideas, what's going on.