Bluetooth не работает (адаптеры не найдены) - ROG CROSSHAIR VIII HERO - AX200 - iwlwifi работает, однако

Мой компьютер:

{21:26}~ ➭ uname -a
Linux trunk3 5.3.0-40-generic #32-Ubuntu SMP Fri Jan 31 20:24:34 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

{21:27}~ ➭ inxi -Fz
System:    Host: trunk3 Kernel: 5.3.0-40-generic x86_64 bits: 64 Desktop: KDE Plasma 5.16.5 Distro: Ubuntu 19.10 (Eoan Ermine) 
Machine:   Type: Desktop Mobo: ASUSTeK model: ROG CROSSHAIR VIII HERO (WI-FI) v: Rev X.0x serial: <filter> 
           UEFI: American Megatrends v: 0803 date: 08/01/2019 
CPU:       Topology: 12-Core model: AMD Ryzen 9 3900X bits: 64 type: MT MCP L2 cache: 6144 KiB 
[...]
Network:   Device-1: Realtek driver: N/A 
           Device-2: Intel I211 Gigabit Network driver: igb 
           IF: enp5s0 state: down mac: <filter> 
           Device-3: Intel driver: iwlwifi 
           IF: wlp6s0 state: up mac: <filter> 

Статус: Wi-Fi работает (в настоящее время подключен только через Wi-Fi)

Проблема: Bluetooth сообщает «адаптеры не найдены».

Что я пробовал:

{21:35}~ ➭ lspci | grep Net
06:00.0 Network controller: Intel Corporation Device 2723 (rev 1a)

{21:35}~ ➭ modprobe -c | grep 2723
alias pci:v00008086d00002723sv*sd00000080bc*sc*i* iwlwifi
[...]

{21:37}~ ➭ dmesg | grep iwl
[    3.304538] iwlwifi 0000:06:00.0: enabling device (0000 -> 0002)
[    3.329819] iwlwifi 0000:06:00.0: TLV_FW_FSEQ_VERSION: FSEQ Version: 43.2.23.17
[    3.329823] iwlwifi 0000:06:00.0: Found debug destination: EXTERNAL_DRAM
[    3.329824] iwlwifi 0000:06:00.0: Found debug configuration: 0
[    3.330042] iwlwifi 0000:06:00.0: loaded firmware version 48.4fa0041f.0 op_mode iwlmvm
[    3.346453] iwlwifi 0000:06:00.0: Detected Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340
[    3.357723] iwlwifi 0000:06:00.0: Applying debug destination EXTERNAL_DRAM
[    3.358098] iwlwifi 0000:06:00.0: Allocated 0x00400000 bytes for firmware monitor.
[    3.505318] iwlwifi 0000:06:00.0: base HW address: dc:71:96:88:62:83
[    3.519954] iwlwifi 0000:06:00.0 wlp6s0: renamed from wlan0
[    4.522491] iwlwifi 0000:06:00.0: Applying debug destination EXTERNAL_DRAM
[    4.670133] iwlwifi 0000:06:00.0: FW already configured (0) - re-configuring
[    8.219398] iwlwifi 0000:06:00.0: Unhandled alg: 0x707

, а также

{21:41}~ ➭ bluetoothctl
Agent registered
[bluetooth]# scan on
No default controller available
[bluetooth]# list
[bluetooth]# quit

{21:42}~ ➭ ll /lib/modules/5.3.0-40-generic/kernel/drivers/bluetooth/
insgesamt 748K
-rw-r--r-- 1 root root  25K Jan 31 19:32 ath3k.ko
-rw-r--r-- 1 root root  13K Jan 31 19:32 bcm203x.ko
-rw-r--r-- 1 root root  26K Jan 31 19:32 bfusb.ko
-rw-r--r-- 1 root root  16K Jan 31 19:32 bluecard_cs.ko
-rw-r--r-- 1 root root  20K Jan 31 19:32 bpa10x.ko
-rw-r--r-- 1 root root  15K Jan 31 19:32 bt3c_cs.ko
-rw-r--r-- 1 root root  16K Jan 31 19:32 btbcm.ko
-rw-r--r-- 1 root root  24K Jan 31 19:32 btintel.ko
-rw-r--r-- 1 root root  36K Jan 31 19:32 btmrvl.ko
-rw-r--r-- 1 root root  42K Jan 31 19:32 btmrvl_sdio.ko
-rw-r--r-- 1 root root  24K Jan 31 19:32 btmtksdio.ko
-rw-r--r-- 1 root root 6,5K Jan 31 19:32 btmtkuart.ko
-rw-r--r-- 1 root root  23K Jan 31 19:32 btqca.ko
-rw-r--r-- 1 root root 8,5K Jan 31 19:32 btrsi.ko
-rw-r--r-- 1 root root  21K Jan 31 19:32 btrtl.ko
-rw-r--r-- 1 root root  16K Jan 31 19:32 btsdio.ko
-rw-r--r-- 1 root root  83K Jan 31 19:32 btusb.ko
-rw-r--r-- 1 root root  13K Jan 31 19:32 btwilink.ko
-rw-r--r-- 1 root root  14K Jan 31 19:32 dtl1_cs.ko
-rw-r--r-- 1 root root  26K Jan 31 19:32 hci_nokia.ko
-rw-r--r-- 1 root root 233K Jan 31 19:32 hci_uart.ko
-rw-r--r-- 1 root root  14K Jan 31 19:32 hci_vhci.ko

Беспроводные ключи не подключаются через USB:

{22:11}~ ➭ lsusb
Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 007 Device 004: ID 04a9:176b Canon, Inc. PIXMA MX920 Series
Bus 007 Device 003: ID 046d:c051 Logitech, Inc. G3 (MX518) Optical Mouse
Bus 007 Device 002: ID 05af:0802 Jing-Mold Enterprise Co., Ltd USB Keyboard
Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 003: ID 05e3:0732 Genesys Logic, Inc. All-in-One Cardreader
Bus 004 Device 002: ID 174c:3074 ASMedia Technology Inc. ASM1074 SuperSpeed hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 174c:2074 ASMedia Technology Inc. ASM1074 High-Speed hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0029 Intel Corp. 
Bus 001 Device 005: ID 0b05:18f3 ASUSTek Computer, Inc. 
Bus 001 Device 003: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 002: ID 28de:1142 Valve Software Wireless Steam Controller
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Я также установил bluez-tools и bluez-tests, но в настоящее время не знаю, как их использовать и работают ли они. полезный. Bluetooth включен в BIOS / UEFI.

{21:52}~ ➭ dmesg | grep -i blue
[    3.311096] Bluetooth: Core ver 2.22
[    3.311124] Bluetooth: HCI device and connection manager initialized
[    3.311126] Bluetooth: HCI socket layer initialized
[    3.311128] Bluetooth: L2CAP socket layer initialized
[    3.311129] Bluetooth: SCO socket layer initialized
[    4.272042] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    4.272044] Bluetooth: BNEP filters: protocol multicast
[    4.272049] Bluetooth: BNEP socket layer initialized
[    5.330777] Bluetooth: hci0: Reading Intel version information failed (-110)
[    5.331075] Bluetooth: hci0: command tx timeout

Есть какие-нибудь намеки на дальнейшую отладку?

Обновление 2020-05-31

Я также установил kubuntu 20.04 LTS, без изменений:

{16:26}~ ➭ uname -a
Linux trunk3 5.4.0-33-generic #37-Ubuntu SMP Thu May 21 12:53:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

{16:26}~ ➭ inxi -Fz
System:    Kernel: 5.4.0-33-generic x86_64 bits: 64 Desktop: KDE Plasma 5.18.5 Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine:   Type: Desktop Mobo: ASUSTeK model: ROG CROSSHAIR VIII HERO (WI-FI) v: Rev X.0x serial: <filter>
           UEFI: American Megatrends v: 0803 date: 08/01/2019
Network:   Device-1: Realtek RTL8125 2.5GbE driver: r8169
           IF: enp4s0 state: down mac: <filter> 
           Device-2: Intel I211 Gigabit Network driver: igb 
           IF: enp5s0 state: up speed: 100 Mbps duplex: full mac: <filter> 
           Device-3: Intel Wi-Fi 6 AX200 driver: iwlwifi 
           IF: wlp6s0 state: down mac: <filter> 

Обновление 2020-09-18

Чтение ответа Дориана Гэнсслена ниже я пробовал следующее:

{9:29}~ ➭ lsmod | grep btusb
btusb                  57344  0
btrtl                  24576  1 btusb
btbcm                  16384  1 btusb
btintel                24576  1 btusb
bluetooth             581632  12 btrtl,btintel,btbcm,bnep,btusb
{9:31}~ ➭ sudo rmmod btusb
{9:32}~ ➭ lsmod | grep btusb
{22:29}~ ➭ sudo modprobe btusb
[sudo] Passwort für kayd: 
{22:57}~ ➭ lsmod | grep btusb                              
btusb                  57344  0
btrtl                  24576  1 btusb
btbcm                  16384  1 btusb
btintel                24576  1 btusb
bluetooth             581632  41 btrtl,btintel,btbcm,bnep,btusb,rfcomm
{22:57}~ ➭ bluetoothctl
Agent registered
[bluetooth]# scan on
Discovery started
[CHG] Controller DC:71:96:88:62:87 Discovering: yes
[NEW] Device BC:30:7D:0E:05:25 Broadcom
[CHG] Device BC:30:7D:0E:05:25 Connected: yes
[CHG] Device BC:30:7D:0E:05:25 Connected: no
[NEW] Device 10:4F:A8:B4:05:B6 h.ear (MDR-100ABN)
[CHG] Device 10:4F:A8:B4:05:B6 Connected: yes
[CHG] Device 10:4F:A8:B4:05:B6 UUIDs: 00001108-0000-1000-8000-00805f9b34fb
[CHG] Device 10:4F:A8:B4:05:B6 UUIDs: 0000110b-0000-1000-8000-00805f9b34fb
[CHG] Device 10:4F:A8:B4:05:B6 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
[CHG] Device 10:4F:A8:B4:05:B6 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device 10:4F:A8:B4:05:B6 UUIDs: 0000111e-0000-1000-8000-00805f9b34fb
[CHG] Device 10:4F:A8:B4:05:B6 ServicesResolved: yes
[CHG] Device 10:4F:A8:B4:05:B6 Paired: yes
[h.ear (MDR-100ABN)]# 

Это сработало. Я пока не могу понять, почему. Однако, хотя это не выглядит как постоянное, но для меня это постоянное исправление, то есть оно все еще работает после перезагрузки.