Voila :
valdo@val:~$ uname -a; lspci -nnk | grep -iA3 net; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
Linux val 5.4.0-52-generic #57-Ubuntu SMP Thu Oct 15 10:57:00 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 01)
Subsystem: ASRock Incorporation Motherboard (one of many) [1849:8168]
Kernel driver in use: r8169
Kernel modules: r8169
--
03:07.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN Controller [10ec:8185] (rev 20)
Subsystem: Realtek Semiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN Controller [10ec:8225]
Kernel driver in use: rtl818x_pci
Kernel modules: rtl818x_pci
[ 5.270343] usb 8-2.1.4: Product: Bluetooth Radio
[ 7.705468] Bluetooth: Core ver 2.22
[ 7.705506] Bluetooth: HCI device and connection manager initialized
[ 7.705517] Bluetooth: HCI socket layer initialized
[ 7.705520] Bluetooth: L2CAP socket layer initialized
[ 7.705525] Bluetooth: SCO socket layer initialized
[ 7.896462] rtk_btusb: Realtek Bluetooth USB driver ver 3.1.9321f79.20200610-155144
[ 9.914370] Bluetooth: hci0: command 0x1001 tx timeout
[ 10.067700] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 10.067703] Bluetooth: BNEP filters: protocol multicast
[ 10.067709] Bluetooth: BNEP socket layer initialized
[ 18.070381] Bluetooth: hci0: RTL: HCI_OP_READ_LOCAL_VERSION failed (-110)
[ 480.103248] usb 8-2.1.4: Product: Bluetooth Radio
[ 480.113258] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761
[ 480.116219] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 480.116222] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761a_fw.bin
[ 480.118866] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761a_config.bin
[ 480.118895] bluetooth hci0: Direct firmware load for rtl_bt/rtl8761a_config.bin failed with error -2
[ 480.118912] Bluetooth: hci0: RTL: cfg_sz -2, total sz 20204
[ 482.387992] Bluetooth: hci0: command 0xfc20 tx timeout
[ 490.387993] Bluetooth: hci0: RTL: download fw command failed (-110)
[ 664.644051] usb 8-2.1.2: Product: Bluetooth Radio
[ 664.654064] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761
[ 664.657008] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 664.657014] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761a_fw.bin
[ 664.657159] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761a_config.bin
[ 664.657172] bluetooth hci0: Direct firmware load for rtl_bt/rtl8761a_config.bin failed with error -2
[ 664.657185] Bluetooth: hci0: RTL: cfg_sz -2, total sz 20204
[ 666.924757] Bluetooth: hci0: command 0xfc20 tx timeout
[ 674.956523] Bluetooth: hci0: RTL: download fw command failed (-110)
[ 1107.294854] Bluetooth: RFCOMM TTY layer initialized
[ 1107.294862] Bluetooth: RFCOMM socket layer initialized
[ 1107.294868] Bluetooth: RFCOMM ver 1.11
[ 1862.581262] Bluetooth: hci0: command 0x1001 tx timeout
[ 1870.709201] Bluetooth: hci0: RTL: HCI_OP_READ_LOCAL_VERSION failed (-110)
[ 1873.888147] usb 8-2.1.2: Product: Bluetooth Radio
[ 480.118895] bluetooth hci0: Direct firmware load for rtl_bt/rtl8761a_config.bin failed with error -2
[ 664.657172] bluetooth hci0: Direct firmware load for rtl_bt/rtl8761a_config.bin failed with error -2
bluetooth 548864 16 btrtl,btintel,btbcm,bnep,btusb,rtk_btusb,rfcomm
ecdh_generic 16384 1 bluetooth
valdo@val:~$
valdo@val:~$ sudo service bluetooth status
[sudo] Mot de passe de valdo :
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2020-11-04 11:26:06 CET; 31min ago
Docs: man:bluetoothd(8)
Main PID: 29048 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 8770)
Memory: 704.0K
CGroup: /system.slice/bluetooth.service
└─29048 /usr/lib/bluetooth/bluetoothd
nov. 04 11:26:06 val systemd[1]: Starting Bluetooth service...
nov. 04 11:26:06 val bluetoothd[29048]: Bluetooth daemon 5.53
nov. 04 11:26:06 val systemd[1]: Started Bluetooth service.
nov. 04 11:26:06 val bluetoothd[29048]: Starting SDP server
nov. 04 11:26:06 val bluetoothd[29048]: Bluetooth management interface 1.14 initialized
nov. 04 11:26:06 val bluetoothd[29048]: No Bluetooth address for index 0
nov. 04 11:32:34 val bluetoothd[29048]: Ignoring index removal for a non-existent adapter
valdo@val:~$
valdo@val:~$ dpkg -l | grep blue
ii blueman 2.1.2-1ubuntu0.1 amd64 Graphical bluetooth manager
ii bluez 5.53-0ubuntu3 amd64 Bluetooth tools and daemons
ii bluez-cups 5.53-0ubuntu3 amd64 Bluetooth printer driver for CUPS
ii bluez-obexd 5.53-0ubuntu3 amd64 bluez obex daemon
ii gir1.2-gnomebluetooth-1.0:amd64 3.34.3-0ubuntu1 amd64 Introspection data for GnomeBluetooth
ii gnome-bluetooth 3.34.3-0ubuntu1 amd64 GNOME Bluetooth tools
ii indicator-bluetooth 0.0.6+17.10.20170605-0ubuntu3 amd64 System bluetooth indicator.
ii libbluetooth3:amd64 5.53-0ubuntu3 amd64 Library to use the BlueZ Linux Bluetooth stack
ii libgnome-bluetooth13:amd64 3.34.3-0ubuntu1 amd64 GNOME Bluetooth tools - support library
ii libkf5bluezqt-data 5.68.0-0ubuntu1 all data files for bluez-qt
ii libkf5bluezqt6:amd64 5.68.0-0ubuntu1 amd64 Qt wrapper for bluez
ii pulseaudio-module-bluetooth 1:13.99.1-1ubuntu3.7 amd64 Bluetooth module for PulseAudio sound server
ii qml-module-org-kde-bluezqt:amd64 5.68.0-0ubuntu1 amd64 QML wrapper for bluez
valdo@val:~$
valdo@val:~$ rfkill list all
0: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: no
6: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
valdo@val:~$