commande:uname -a; lspci -nnk | grep -iA3 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
~$ uname -a; lspci -nnk | grep -iA3 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
Linux fanny-HP-Laptop-15-dw1xxx 5.8.0-38-generic #43~20.04.1-Ubuntu SMP Tue Jan 12 16:39:47 UTC 2021 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 15)
	DeviceName: Hanksville Gbe Lan Connection
	Subsystem: Hewlett-Packard Company RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [103c:85f1]
	Kernel driver in use: r8169
	Kernel modules: r8169
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]
	DeviceName: WLAN
	Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:831a]
	Kernel driver in use: rtl8821ce
	Kernel modules: rtl8821ce
03:00.0 Non-Volatile memory controller [0108]: Intel Corporation SSD 660P Series [8086:f1a8] (rev 03)
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 30c9:0013 DJKCVA1G4E36R0 HP TrueVision HD Camera
Bus 001 Device 003: ID 062a:4101 MosArt Semiconductor Corp. Wireless Keyboard/Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[    2.174307] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
2nde commande:dpkg -l | grep blue
fanny@fanny-HP-Laptop-15-dw1xxx:~$ dpkg -l | grep blue
ii  blueman                                    2.1.2-1ubuntu0.2                      amd64        Graphical bluetooth manager
ii  bluetooth                                  5.53-0ubuntu3                         all          Bluetooth support
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  bluez-tools                                2.0~20170911.0.7cb788c-2build1        amd64        Set of tools to manage Bluetooth devices for linux
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  libbluetooth3:amd64                        5.53-0ubuntu3                         amd64        Library to use the BlueZ Linux Bluetooth stack
ii  libgnome-bluetooth-dev:amd64               3.34.3-0ubuntu1                       amd64        GNOME Bluetooth tools - support library development files
ii  libgnome-bluetooth13:amd64                 3.34.3-0ubuntu1                       amd64        GNOME Bluetooth tools - support library
ii  pulseaudio-module-bluetooth                1:13.99.1-1ubuntu3.8                  amd64        Bluetooth module for PulseAudio sound server
fanny@fanny-HP-Laptop-15-dw1xxx:~$ 
3eme commande: rfkill list all
fanny@fanny-HP-Laptop-15-dw1xxx:~$ rfkill list all
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
fanny@fanny-HP-Laptop-15-dw1xxx:~$ 
4eme commande:sudo service bluetooth status
fanny@fanny-HP-Laptop-15-dw1xxx:~$ sudo service bluetooth status
● bluetooth.service - Bluetooth service
     Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
     Active: inactive (dead)
       Docs: man:bluetoothd(8)
janv. 26 08:47:13 fanny-HP-Laptop-15-dw1xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.
janv. 26 08:48:50 fanny-HP-Laptop-15-dw1xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.
janv. 26 09:30:26 fanny-HP-Laptop-15-dw1xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.
janv. 26 14:01:18 fanny-HP-Laptop-15-dw1xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.
janv. 26 14:47:55 fanny-HP-Laptop-15-dw1xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.
janv. 26 17:01:48 fanny-HP-Laptop-15-dw1xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.
janv. 26 17:25:13 fanny-HP-Laptop-15-dw1xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.
fanny@fanny-HP-Laptop-15-dw1xxx:~$