Merci de se premier élément de réponse.
Dans un premier temps, voici le retour des commandes que tu m'as demandé
chrys@chrys-X302LJ:~$ uname -a; lspci -nnk | grep -iA3 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
Linux chrys-X302LJ 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:22:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)
Subsystem: ASUSTeK Computer Inc. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1043:200f]
Kernel driver in use: r8169
Kernel modules: r8169
03:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Lite-On Communications Inc BCM43142 802.11b/g/n [11ad:6675]
Kernel driver in use: wl
Kernel modules: wl
Bus 001 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 003: ID 04ca:2006 Lite-On Technology Corp. Broadcom BCM43142A0 Bluetooth Device
Bus 002 Device 002: ID 0bda:57b5 Realtek Semiconductor Corp.
Bus 002 Device 004: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[ 23.133666] Bluetooth: Core ver 2.22
[ 23.133698] Bluetooth: HCI device and connection manager initialized
[ 23.133703] Bluetooth: HCI socket layer initialized
[ 23.133707] Bluetooth: L2CAP socket layer initialized
[ 23.133716] Bluetooth: SCO socket layer initialized
[ 23.257809] Bluetooth: hci0: BCM: chip id 70
[ 23.258807] Bluetooth: hci0: BCM: features 0x06
[ 23.274817] Bluetooth: hci0: BCM43142A
[ 23.274822] Bluetooth: hci0: BCM (001.001.011) build 0000
[ 23.327904] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[ 23.327908] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[ 25.344062] Bluetooth: hci0: command 0x1003 tx timeout
[ 30.087891] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 30.087893] Bluetooth: BNEP filters: protocol multicast
[ 30.087897] Bluetooth: BNEP socket layer initialized
[ 32.320067] Bluetooth: hci0: command 0x1001 tx timeout
[ 125.817327] Bluetooth: RFCOMM TTY layer initialized
[ 125.817339] Bluetooth: RFCOMM socket layer initialized
[ 125.817347] Bluetooth: RFCOMM ver 1.11
[ 1325.192796] Bluetooth: hci0: command 0x1003 tx timeout
[ 0.028195] Spectre V2 : Enabling Restricted Speculation for firmware calls
[ 1.801071] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x381f00)
[ 23.327904] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
bluetooth 548864 43 btrtl,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic 24576 2 bluetooth
chrys@chrys-X302LJ:~$ sudo service bluetooth status
[sudo] Mot de passe de chrys :
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset
Active: active (running) since Sat 2019-08-17 09:40:52 CEST; 31min ago
Docs: man:bluetoothd(8)
Main PID: 897 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 4494)
CGroup: /system.slice/bluetooth.service
└─897 /usr/lib/bluetooth/bluetoothd
août 17 09:40:52 chrys-X302LJ systemd[1]: Starting Bluetooth service...
août 17 09:40:52 chrys-X302LJ systemd[1]: Started Bluetooth service.
août 17 09:40:52 chrys-X302LJ bluetoothd[897]: Bluetooth daemon 5.48
août 17 09:40:52 chrys-X302LJ bluetoothd[897]: Starting SDP server
août 17 09:40:52 chrys-X302LJ bluetoothd[897]: Bluetooth management interface 1.
août 17 09:40:54 chrys-X302LJ bluetoothd[897]: Loading LTKs timed out for hci0
août 17 09:42:28 chrys-X302LJ bluetoothd[897]: Endpoint registered: sender=:1.86
août 17 09:42:28 chrys-X302LJ bluetoothd[897]: Endpoint registered: sender=:1.86
lines 1-18/18 (END)
chrys@chrys-X302LJ:~$ dpkg -l | grep blue
ii bluez 5.48-0ubuntu3.1 amd64 Bluetooth tools and daemons
ii bluez-cups 5.48-0ubuntu3.1 amd64 Bluetooth printer driver for CUPS
ii bluez-obexd 5.48-0ubuntu3.1 amd64 bluez obex daemon
ii gir1.2-gnomebluetooth-1.0:amd64 3.28.0-2ubuntu0.2 amd64 Introspection data for GnomeBluetooth
ii gnome-bluetooth 3.28.0-2ubuntu0.2 amd64 GNOME Bluetooth tools
ii indicator-bluetooth 0.0.6+17.10.20170605-0ubuntu3 amd64 System bluetooth indicator.
ii libbluetooth3:amd64 5.48-0ubuntu3.1 amd64 Library to use the BlueZ Linux Bluetooth stack
ii libgnome-bluetooth13:amd64 3.28.0-2ubuntu0.2 amd64 GNOME Bluetooth tools - support library
ii pulseaudio-module-bluetooth 1:11.1-1ubuntu7.2 amd64 Bluetooth module for PulseAudio sound server
chrys@chrys-X302LJ:~$ rfkill list all
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no