Voila :
>> cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"
>> lsusb
Bus 001 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 002: ID 4e53:5407
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 006: ID 0b97:7762 O2 Micro, Inc. Oz776 SmartCard Reader
Bus 002 Device 005: ID 0483:2016 STMicroelectronics Fingerprint Reader
Bus 002 Device 003: ID 0b97:7761 O2 Micro, Inc. Oz776 1.1 Hub
Bus 002 Device 002: ID 413c:a005 Dell Computer Corp. Internal 2.0 Hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>> lspci -k -nn | grep -A 3 -i net
09:00.0 Ethernet controller [0200]: Broadcom Inc. and subsidiaries NetXtreme BCM5752 Gigabit Ethernet PCI Express [14e4:1600] (rev 02)
Subsystem: Dell Latitude D620 [1028:01c2]
Kernel driver in use: tg3
Kernel modules: tg3
0c:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)
Subsystem: Dell Wireless 1390 WLAN Mini-Card [1028:0007]
Kernel driver in use: b43-pci-bridge
Kernel modules: ssb, wl
>> sudo lshw -C network
*-network
description: Interface réseau sans fil
produit: BCM4311 802.11b/g WLAN
fabriquant: Broadcom Inc. and subsidiaries
identifiant matériel: 0
information bus: pci@0000:0c:00.0
nom logique: wlan0
version: 01
numéro de série: 00:19:7e:11:4d:16
bits: 32 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=b43 driverversion=5.3.0-28-generic firmware=666.2 ip=192.168.1.90 latency=0 link=yes multicast=yes wireless=IEEE 802.11
ressources: irq:17 mémoire:efdfc000-efdfffff
*-network
description: Ethernet interface
produit: NetXtreme BCM5752 Gigabit Ethernet PCI Express
fabriquant: Broadcom Inc. and subsidiaries
identifiant matériel: 0
information bus: pci@0000:09:00.0
nom logique: enp9s0
version: 02
numéro de série: 00:18:8b:c4:7e:6c
capacité: 1Gbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 firmware=5752-v3.19 latency=0 link=no multicast=yes port=twisted pair
ressources: irq:28 mémoire:efcf0000-efcfffff
>> lsmod | sort
autofs4 45056 2
b43 393216 0
bcma 57344 1 b43
bluetooth 499712 14 btrtl,btintel,bnep,btbcm,rfcomm,btusb
bnep 24576 2
btbcm 16384 1 btusb
btintel 24576 1 btusb
btrfs 1196032 0
btrtl 20480 1 btusb
btusb 53248 0
ccm 20480 3
cdc_ether 20480 1 rndis_host
cfg80211 618496 2 b43,mac80211
cordic 16384 1 b43
coretemp 20480 0
cpuid 16384 0
dcdbas 20480 1 dell_smbios
dell_laptop 20480 0
dell_rbtn 20480 0
dell_smbios 28672 2 dell_wmi,dell_laptop
dell_smm_hwmon 16384 0
dell_wmi 20480 0
dell_wmi_descriptor 20480 2 dell_wmi,dell_smbios
drm 389120 4 i915,drm_kms_helper
drm_kms_helper 159744 1 i915
ecc 40960 1 ecdh_generic
ecdh_generic 16384 1 bluetooth
fb_sys_fops 16384 1 drm_kms_helper
gpio_ich 16384 0
hfs 57344 0
hfsplus 94208 0
hid 110592 2 hid_generic,usbhid
hid_generic 16384 0
i2c_algo_bit 16384 1 i915
i915 1531904 2
input_leds 16384 0
ip_tables 24576 0
irqbypass 16384 1 kvm
jfs 176128 0
joydev 24576 0
kvm 573440 0
ledtrig_audio 16384 2 snd_hda_codec_generic,dell_laptop
libarc4 16384 1 mac80211
libcrc32c 16384 2 btrfs,xfs
lp 20480 0
lpc_ich 24576 0
mac80211 745472 1 b43
mac_hid 16384 0
mii 16384 1 usbnet
minix 32768 0
Module Size Used by
msdos 20480 0
ntfs 98304 0
parport 49152 3 lp,parport_pc,ppdev
parport_pc 32768 0
pata_acpi 16384 0
pcmcia 57344 0
pcmcia_core 28672 3 yenta_socket,pcmcia,pcmcia_rsrc
pcmcia_rsrc 24576 1 yenta_socket
ppdev 24576 0
psmouse 139264 0
qnx4 16384 0
raid6_pq 106496 1 btrfs
rfcomm 65536 0
rndis_host 20480 0
sch_fq_codel 20480 6
serio_raw 20480 0
snd 69632 17 snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_hda_codec_idt,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_pcm
snd_hda_codec 118784 4 snd_hda_intel,snd_hda_codec_idt,snd_hda_codec_hdmi,snd_hda_codec_generic
snd_hda_codec_generic 73728 1 snd_hda_codec_idt
snd_hda_codec_hdmi 49152 1
snd_hda_codec_idt 57344 1
snd_hda_core 77824 5 snd_hda_intel,snd_hda_codec,snd_hda_codec_idt,snd_hda_codec_hdmi,snd_hda_codec_generic
snd_hda_intel 40960 3
snd_hwdep 16384 1 snd_hda_codec
snd_pcm 90112 4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi
snd_rawmidi 32768 1 snd_seq_midi
snd_seq 61440 2 snd_seq_midi_event,snd_seq_midi
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_seq_midi 20480 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_timer 32768 2 snd_seq,snd_pcm
soundcore 16384 1 snd
sparse_keymap 16384 1 dell_wmi
ssb 61440 2 b43,ssb_hcd
ssb_hcd 16384 0
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
tg3 159744 0
uas 20480 0
ufs 73728 0
usbhid 53248 0
usbnet 45056 2 rndis_host,cdc_ether
usb_storage 61440 1 uas
video 45056 3 dell_wmi,dell_laptop,i915
wmi 28672 4 dell_wmi,wmi_bmof,dell_wmi_descriptor,dell_smbios
wmi_bmof 16384 0
xfs 1146880 0
xor 28672 1 btrfs
x_tables 32768 1 ip_tables
yenta_socket 40960 0
zstd_compress 155648 1 btrfs
>> iwconfig
wlan0 IEEE 802.11 ESSID:"La Cheneraie n. 7 - 2.4 GHz"
Mode:Managed Frequency:2.437 GHz Access Point: E4:5D:51:7A:86:E6
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=60/70 Signal level=-50 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:2 Invalid misc:94 Missed beacon:0
>> ifconfig -a
enp9s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:18:8b:c4:7e:6c txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 18
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 1662 bytes 139861 (139.8 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1662 bytes 139861 (139.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.90 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::3ca0:8ffd:3086:a0f0 prefixlen 64 scopeid 0x20<link>
ether 00:19:7e:11:4d:16 txqueuelen 1000 (Ethernet)
RX packets 3874 bytes 3005761 (3.0 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2584 bytes 414021 (414.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>> sudo iwlist scan
wlan0 Scan completed :
Cell 01 - Address: E4:5D:51:7A:86:E6
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=61/70 Signal level=-49 dBm
Encryption key:on
ESSID:"La Cheneraie n. 7 - 2.4 GHz"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000003c57724c54
Extra: Last beacon: 36ms ago
IE: Unknown: 001B4C61204368656E6572616965206E2E2037202D20322E342047487A
IE: Unknown: 010882848B962430486C
IE: Unknown: 030106
IE: Unknown: 2A0104
IE: Unknown: 32040C121860
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 0B050B004A0000
IE: Unknown: 46053208010000
IE: Unknown: 2D1ABC081BFFFF000000000000000000000000000000000000000000
IE: Unknown: 3D1606001700000000000000000000000000000000000000
IE: Unknown: 7F080400080000000040
IE: Unknown: DDA00050F204104A0001101044000102103B00010310470010000000000000000000000000000000001021000D4E42365641432D4658432D72301023000D4E42365641432D4658432D72301024000D4E42365641432D4658432D72301042000C4534354435313741383645301054000800060050F20400011011001B4C61204368656E6572616965206E2E2037202D20322E342047487A100800020480103C000101
IE: Unknown: DD09001018020B000C0000
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
Cell 02 - Address: 62:5D:51:38:0A:35
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=31/70 Signal level=-79 dBm
Encryption key:on
ESSID:"SFR WiFi Mobile"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=00000040601d619d
Extra: Last beacon: 4800ms ago
IE: Unknown: 000F5346522057694669204D6F62696C65
IE: Unknown: 010882848B962430486C
IE: Unknown: 030101
IE: Unknown: 050401030000
IE: Unknown: 2A0104
IE: Unknown: 32040C121860
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : 802.1x
IE: Unknown: 0B050000110000
IE: Unknown: 46053208010000
IE: Unknown: 2D1ABC081BFFFF000000000000000000000000000000000000000000
IE: Unknown: 3D1601000400000000000000000000000000000000000000
IE: Unknown: 7F03040008
IE: Unknown: DD090010180200000C0000
Cell 03 - Address: 00:19:70:96:82:6E
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=28/70 Signal level=-82 dBm
Encryption key:on
ESSID:"Livebox-4e90"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000178aa7ed180
Extra: Last beacon: 1372ms ago
IE: Unknown: 000C4C697665626F782D34653930
IE: Unknown: 010882848B960C121824
IE: Unknown: 030106
IE: Unknown: 050400030000
IE: Unknown: 2A0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101870003A4000027A4000042435E0062322F00
IE: Unknown: 2D1A0C101BFFFF000000000000000000000000000000000000000000
IE: Unknown: 3D1606000900000000000000000000000000000000000000
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010000000000
IE: Unknown: 0706465220010D14
IE: Unknown: DD210050F204104A00011010440001021011000F4C697665626F782046545448207632
>> uname -r -m
5.3.0-28-generic i686
>> 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