Merci !
Effectivement, il semble que le bouton activer/désactiver le wifi n'ait aucun effet.
Voici le résultat du wificheck :
>> cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.1 LTS"
>> lsusb
Bus 002 Device 002: ID 04f2:b249 Chicony Electronics Co., Ltd
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>> lspci -k -nn | grep -A 3 -i net
06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 05)
DeviceName: Realtek PCIe FE Family Controller
Subsystem: Hewlett-Packard Company RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [103c:3577]
Kernel driver in use: r8169
Kernel modules: r8169
07:00.0 Network controller [0280]: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe [1814:5390]
DeviceName: Ralink 5390GN 802.11b/g/n 1x1 WiFi Adapter
Subsystem: Hewlett-Packard Company U98Z077.00 Half-size Mini PCIe Card [103c:1636]
Kernel driver in use: rt2800pci
>> sudo lshw -C network
*-network
description: Ethernet interface
produit: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
fabriquant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:06:00.0
nom logique: eth0
version: 05
numéro de série: e4:11:5b:f9:ec:fa
taille: 100Mbit/s
capacité: 100Mbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8105e-1.fw ip=192.168.0.11 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
ressources: irq:28 portE/S:2000(taille=256) mémoire:f0104000-f0104fff mémoire:f0100000-f0103fff
*-network DÉSACTIVÉ
description: Interface réseau sans fil
produit: RT5390 Wireless 802.11n 1T/1R PCIe
fabriquant: Ralink corp.
identifiant matériel: 0
information bus: pci@0000:07:00.0
nom logique: wlan0
version: 00
numéro de série: e4:d5:3d:39:7f:0d
bits: 32 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rt2800pci driverversion=4.4.0-31-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
ressources: irq:23 mémoire:f0200000-f020ffff
>> lsmod
Module Size Used by
uvcvideo 77824 0
videobuf2_vmalloc 16384 1 uvcvideo
hp_wmi 16384 0
videobuf2_memops 16384 1 videobuf2_vmalloc
sparse_keymap 16384 1 hp_wmi
videobuf2_v4l2 28672 1 uvcvideo
videobuf2_core 36864 2 uvcvideo,videobuf2_v4l2
v4l2_common 16384 1 videobuf2_v4l2
arc4 16384 2
snd_hda_codec_realtek 73728 1
videodev 155648 4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
snd_hda_codec_generic 69632 1 snd_hda_codec_realtek
snd_hda_intel 36864 3
snd_hda_codec 118784 3 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_intel
kvm 471040 0
snd_hda_core 61440 4 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
media 24576 2 uvcvideo,videodev
rt2800pci 16384 0
snd_hwdep 16384 1 snd_hda_codec
rt2800mmio 16384 1 rt2800pci
rt2800lib 90112 2 rt2800pci,rt2800mmio
rt2x00pci 16384 1 rt2800pci
irqbypass 16384 1 kvm
snd_pcm 94208 3 snd_hda_codec,snd_hda_intel,snd_hda_core
rt2x00mmio 16384 2 rt2800pci,rt2800mmio
rt2x00lib 49152 5 rt2x00pci,rt2800lib,rt2800pci,rt2800mmio,rt2x00mmio
mac80211 659456 3 rt2x00lib,rt2x00pci,rt2800lib
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 28672 1 snd_seq_midi
cfg80211 499712 2 mac80211,rt2x00lib
snd_seq 57344 2 snd_seq_midi_event,snd_seq_midi
input_leds 16384 0
joydev 20480 0
eeprom_93cx6 16384 1 rt2800pci
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_pcm,snd_seq
crc_ccitt 16384 1 rt2800lib
serio_raw 16384 0
snd 69632 16 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
rtsx_pci_ms 20480 0
memstick 16384 1 rtsx_pci_ms
k10temp 16384 0
soundcore 16384 1 snd
shpchp 32768 0
i2c_piix4 20480 0
hp_wireless 16384 0
mac_hid 16384 0
binfmt_misc 20480 1
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 45056 3 lp,ppdev,parport_pc
autofs4 40960 2
rtsx_pci_sdmmc 24576 0
radeon 1466368 8
psmouse 118784 0
i2c_algo_bit 16384 1 radeon
ttm 90112 1 radeon
drm_kms_helper 131072 1 radeon
syscopyarea 16384 1 drm_kms_helper
r8169 77824 0
sysfillrect 16384 1 drm_kms_helper
mii 16384 1 r8169
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
rtsx_pci 53248 2 rtsx_pci_ms,rtsx_pci_sdmmc
ahci 36864 2
drm 311296 11 ttm,drm_kms_helper,radeon
libahci 32768 1 ahci
wmi 20480 1 hp_wmi
fjes 28672 0
video 36864 0
>> iwconfig
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=off
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
>> ifconfig -a
eth0 Link encap:Ethernet HWaddr e4:11:5b:f9:ec:fa
inet adr:192.168.0.11 Bcast:192.168.0.255 Masque:255.255.255.0
adr inet6: fe80::2f5:ef6:7d0e:9e46/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:9095 erreurs:0 :0 overruns:0 frame:0
TX packets:6602 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:10789285 (10.7 MB) Octets transmis:644254 (644.2 KB)
lo Link encap:Boucle locale
inet adr:127.0.0.1 Masque:255.0.0.0
adr inet6: ::1/128 Scope:Hôte
UP LOOPBACK RUNNING MTU:65536 Metric:1
Packets reçus:651 erreurs:0 :0 overruns:0 frame:0
TX packets:651 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1
Octets reçus:57740 (57.7 KB) Octets transmis:57740 (57.7 KB)
wlan0 Link encap:Ethernet HWaddr e4:d5:3d:39:7f:0d
BROADCAST MULTICAST MTU:1500 Metric:1
Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:0 (0.0 B) Octets transmis:0 (0.0 B)
>> sudo iwlist scan
>> uname -r -m
4.4.0-31-generic i686
>> cat /etc/network/interfaces
auto lo
iface lo inet loopback
>> nm-tool
>> nmcli dev wifi
* SSID MODE CHAN DÉBIT SIGNAL BARS SÉCURITÉ
>> nmcli connection show
NOM UUID TYPE PÉRIPHÉRIQUE
Connexion filaire 1 e4f0dfd9-6c7b-4075-8762-2be3a79cefa4 802-3-ethernet eth0
BRASSERIE_POLYGONE 3eb3bfe4-9e51-43fb-b103-4d6509f8daf3 802-11-wireless --
FreeWifi 2683c4d5-58c9-4442-b2ed-d91704c521c5 802-11-wireless --
Freebox-5EAE77 b606b866-ae1b-47d3-beab-35e1adb810e3 802-11-wireless --
Office_de_Tourisme 8923b7cc-245f-4f9e-860e-de745c6af2a6 802-11-wireless --
SFR WiFi FON fd66333f-f2ad-4b99-b79a-167858b8aad5 802-11-wireless --
bienvenue@ca-corse 7ada6603-6350-4611-8118-c8762df3f0d0 802-11-wireless --
orange a953b3ba-2e2a-4a66-a928-535a29262980 802-11-wireless --
>> sudo rfkill list
0: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: yes
1: hp-wifi: Wireless LAN
Soft blocked: no
Hard blocked: yes
Merci de votre aide !