Maybe it's because of "Failed to send firmware signature"
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$ sudo dmesg | grep -i blue
[ 6.173622] Bluetooth: Core ver 2.22
[ 6.173663] Bluetooth: HCI device and connection manager initialized
[ 6.174498] Bluetooth: HCI socket layer initialized
[ 6.174502] Bluetooth: L2CAP socket layer initialized
[ 6.174513] Bluetooth: SCO socket layer initialized
[ 6.251238] Bluetooth: hci0: Bootloader revision 0.3 build 0 week 24 2017
[ 6.252251] Bluetooth: hci0: Device revision is 1
[ 6.252253] Bluetooth: hci0: Secure boot is enabled
[ 6.252254] Bluetooth: hci0: OTP lock is enabled
[ 6.252255] Bluetooth: hci0: API lock is enabled
[ 6.252256] Bluetooth: hci0: Debug lock is disabled
[ 6.252258] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 6.273875] bluetooth hci0: firmware: direct-loading firmware intel/ibt-20-1-3.sfi
[ 6.273888] Bluetooth: hci0: Found device firmware: intel/ibt-20-1-3.sfi
[ 6.280270] Bluetooth: hci0: Failed to send firmware signature (-38)
[ 6.779978] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 6.779981] Bluetooth: BNEP filters: protocol multicast
[ 6.779989] Bluetooth: BNEP socket layer initialized
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$ sudo hcitool dev
Devices:
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$ sudo rfkill
ID TYPE DEVICE SOFT HARD
0 bluetooth hci0 unblocked unblocked
haegarthehorrible@Cherry:~$ sudo bluetoothctl
Agent registered
[bluetooth]# devices
No default controller available
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~$ uname -a
Linux Cherry 5.4.0-0.bpo.4-amd64 #1 SMP Debian 5.4.19-1~bpo10+1 (2020-03-09) x86_64 GNU/Linux
This site does says nothing about Bluetooth:
https://www.intel.com/content/www/us/en ... rking.html
With a lot of Googlefu it seems like
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iwlwifi-cc-a0-46.ucode
ibt-20-1-3.sfi
ibt-20-1-3.ddc
But i ask myself how do you know that?
This site has nothing about AX200:
https://packages.debian.org/bullseye/al ... re-iwlwifi
Since that AX200 has a cable to USB, shouldn't i see something Bluetooth here:
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$ lsusb
Bus 001 Device 006: ID 0eef:0005 D-WAV Scientific Co., Ltd
Bus 001 Device 005: ID 8087:0029 Intel Corp.
Bus 001 Device 004: ID 0409:005a NEC Corp. HighSpeed Hub
Bus 001 Device 003: ID 0ccd:0028 TerraTec Electronic GmbH Aureon 5.1 MkII
Bus 001 Device 002: ID 8087:07e6 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I did this:
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$ sudo dmesg | grep firmware
[ 0.335263] Spectre V2 : Enabling Restricted Speculation for firmware calls
[ 6.075540] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-50.ucode (-2)
[ 6.075618] firmware_class: See https://wiki.debian.org/Firmware for information about missing firmware
[ 6.075699] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-50.ucode failed with error -2
[ 6.075727] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-49.ucode (-2)
[ 6.075797] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-49.ucode failed with error -2
[ 6.075820] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-48.ucode (-2)
[ 6.075889] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-48.ucode failed with error -2
[ 6.075911] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-47.ucode (-2)
[ 6.075980] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-47.ucode failed with error -2
[ 6.125643] iwlwifi 0000:01:00.0: firmware: direct-loading firmware iwlwifi-cc-a0-46.ucode
[ 6.126091] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-45.ucode (-2)
[ 6.126095] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-45.ucode failed with error -2
[ 6.126120] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-44.ucode (-2)
[ 6.126127] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-44.ucode failed with error -2
[ 6.126148] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-43.ucode (-2)
[ 6.126155] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-43.ucode failed with error -2
[ 6.126176] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-42.ucode (-2)
[ 6.126182] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-42.ucode failed with error -2
[ 6.126204] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-41.ucode (-2)
[ 6.126210] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-41.ucode failed with error -2
[ 6.126231] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-40.ucode (-2)
[ 6.126237] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-40.ucode failed with error -2
[ 6.126257] iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-cc-a0-39.ucode (-2)
[ 6.126263] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-cc-a0-39.ucode failed with error -2
[ 6.126277] iwlwifi 0000:01:00.0: check git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
[ 6.162696] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 6.184946] bluetooth hci0: firmware: direct-loading firmware intel/ibt-20-1-3.sfi
[ 6.184958] Bluetooth: hci0: Found device firmware: intel/ibt-20-1-3.sfi
[ 6.191186] Bluetooth: hci0: Failed to send firmware signature (-38)
Because for testing i did install "firmware-iwlwifi" and the outcome is the same.