Merci pour vos réponses, voici le résultat du wificheck :
>> cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.1 LTS"
>> lsusb
Bus 001 Device 003: ID 0bda:b009 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 0438:7900 Advanced Micro Devices, Inc.
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 002: ID 1bcf:2c9b Sunplus Innovation Technology Inc.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> lspci -k -nn | grep -A 3 -i net
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
Subsystem: Hewlett-Packard Company RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [103c:8330]
Kernel driver in use: r8169
Kernel modules: r8169
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:d723]
Subsystem: Hewlett-Packard Company Device [103c:8319]
Kernel modules: wl
>> sudo lshw -C network
*-network
description: Ethernet interface
produit: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
fabriquant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:02:00.0
nom logique: enp2s0
version: 15
numéro de série: 18:60:24:14:d4:30
taille: 1Gbit/s
capacité: 1Gbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.1.20 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
ressources: irq:32 portE/S:3000(taille=256) mémoire:f0304000-f0304fff mémoire:f0300000-f0303fff
*-network NON-RÉCLAMÉ
description: Network controller
produit: Realtek Semiconductor Co., Ltd.
fabriquant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:03:00.0
version: 00
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress cap_list
configuration: latency=0
ressources: portE/S:2000(taille=256) mémoire:f1000000-f100ffff
>> lsmod
Module Size Used by
rfcomm 77824 4
cmac 16384 1
bnep 20480 2
nls_iso8859_1 16384 1
snd_hda_codec_realtek 106496 1
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_hda_codec_hdmi 49152 1
snd_hda_intel 40960 8
wl 6447104 0
edac_mce_amd 28672 0
snd_hda_codec 126976 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
kvm 598016 0
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
uvcvideo 86016 0
ghash_clmulni_intel 16384 0
snd_hda_core 81920 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_hwdep 20480 1 snd_hda_codec
pcbc 16384 0
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
videobuf2_v4l2 24576 1 uvcvideo
aesni_intel 188416 2
snd_pcm 98304 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
videobuf2_core 40960 2 videobuf2_v4l2,uvcvideo
aes_x86_64 20480 1 aesni_intel
btusb 45056 0
crypto_simd 16384 1 aesni_intel
snd_seq_midi 16384 0
cfg80211 622592 1 wl
joydev 24576 0
input_leds 16384 0
btrtl 16384 1 btusb
snd_seq_midi_event 16384 1 snd_seq_midi
btbcm 16384 1 btusb
snd_rawmidi 32768 1 snd_seq_midi
btintel 16384 1 btusb
glue_helper 16384 1 aesni_intel
cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel
videodev 184320 3 videobuf2_core,videobuf2_v4l2,uvcvideo
media 40960 2 videodev,uvcvideo
hp_wmi 16384 0
sparse_keymap 16384 1 hp_wmi
wmi_bmof 16384 0
bluetooth 548864 33 btrtl,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic 24576 2 bluetooth
snd_seq 65536 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 32768 2 snd_seq,snd_pcm
serio_raw 16384 0
fam15h_power 16384 0
snd 81920 27 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm,snd_rawmidi
shpchp 36864 0
soundcore 16384 1 snd
sch_fq_codel 20480 2
mac_hid 16384 0
hp_wireless 16384 0
parport_pc 36864 0
ppdev 20480 0
lp 20480 0
parport 49152 3 parport_pc,lp,ppdev
ip_tables 28672 0
x_tables 40960 1 ip_tables
autofs4 40960 2
amdkfd 180224 1
amd_iommu_v2 20480 1 amdkfd
amdgpu 2703360 22
chash 16384 1 amdgpu
i2c_algo_bit 16384 1 amdgpu
ttm 106496 1 amdgpu
drm_kms_helper 172032 1 amdgpu
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
psmouse 147456 0
ahci 36864 3
i2c_piix4 24576 0
libahci 32768 1 ahci
r8169 86016 0
drm 401408 16 drm_kms_helper,amdgpu,ttm
mii 16384 1 r8169
wmi 24576 2 hp_wmi,wmi_bmof
i2c_scmi 16384 0
video 45056 0
>> iwconfig
>> ifconfig -a
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.20 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 2a01:cb15:82ab:b00:62:afec:5ac9:a0f4 prefixlen 64 scopeid 0x0<global>
inet6 fe80::7b51:2cf7:54b6:1031 prefixlen 64 scopeid 0x20<link>
inet6 2a01:cb15:82ab:b00:b57b:f866:fcd2:30c9 prefixlen 64 scopeid 0x0<global>
ether 18:60:24:14:d4:30 txqueuelen 1000 (Ethernet)
RX packets 3243 bytes 3564780 (3.5 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1555 bytes 225244 (225.2 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Boucle locale)
RX packets 537 bytes 38867 (38.8 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 537 bytes 38867 (38.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>> sudo iwlist scan
>> uname -r -m
4.15.0-39-generic x86_64
>> cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
>> nm-tool
>> nmcli dev wifi
>> nmcli connection list (< 15.04) ou nmcli connection show (>= 15.04)
NAME UUID TYPE DEVICE
Connexion filaire 1 8569ca35-9624-3ff1-a1a4-736619eacf93 ethernet enp2s0
>> nmcli connection status
>> sudo rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
Je suis actuellement branché par câble Ethernet.
Dans l'attente de vos réponses,
ClipsyBlitz.