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pierrepatou

problème wifi (carte RT5390 Wireless 802.11n)

Bonjour,

Je suis sous Ubuntu depuis peu et n'arrive pas à avoir de connexion Wifi. La connexion filaire fonctionne sans problèmes : c'est grâce à cela que je me suis connecté sur le forum (où j'ai déjà cherché une réponse à mon problème sans la trouver).
Généralement, la connexion Wifi fonctionne quelques secondes, voire minutes au mieux, tout en étant anormalement lente, avant de se déconnecter et de chercher à se reconnecter sans succès, ou alors seulement quelques secondes.

J'ai un Asus X401U-WX074H. J'ai uniquement remplacé le disque dur par un modèle identique depuis son achat, et je suis en même temps passé de Windows 8 (où il n'y avait aucun problème de Wifi) à Ubuntu 14.04.
Ma carte Wifi est une carte RT5390 Wireless 802.11n et je ne sais pas quel est le pilote employé.

Voici les informations demandées dans la rubrique "avant de poster" :

cat /etc/lsb-release

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.1 LTS"

lsusb

Bus 002 Device 002: ID 0bda:5705 Realtek Semiconductor Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 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
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 002: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

lspci

00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 14h Processor Root Complex
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler [Radeon HD 7340]
00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler HDMI Audio
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 14h Processor Root Port
00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 03)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [IDE mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 14)
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD] FCH IDE Controller
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 01)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] FCH PCI Bridge (rev 40)
00:14.7 SD Host controller: Advanced Micro Devices, Inc. [AMD] FCH SD Flash Controller
00:15.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Hudson PCI to PCI bridge (PCIE port 0)
00:15.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Hudson PCI to PCI bridge (PCIE port 1)
00:15.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Hudson PCI to PCI bridge (PCIE port 3)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 0 (rev 43)
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 6
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 5
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 7
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
07:00.0 Network controller: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe

lspci -nn | grep -i net

06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
07:00.0 Network controller [0280]: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe [1814:5390]

lspci -k

00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 14h Processor Root Complex
	Subsystem: Advanced Micro Devices, Inc. [AMD] Family 14h Processor Root Complex
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler [Radeon HD 7340]
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: radeon
00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler HDMI Audio
	Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler HDMI Audio
	Kernel driver in use: snd_hda_intel
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 14h Processor Root Port
	Kernel driver in use: pcieport
00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 03)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: xhci_hcd
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [IDE mode] (rev 40)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: ahci
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: ohci-pci
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: ehci-pci
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: ohci-pci
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: ehci-pci
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 14)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD] FCH IDE Controller
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: pata_atiixp
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 01)
	Subsystem: ASUSTeK Computer Inc. Device 1c93
	Kernel driver in use: snd_hda_intel
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] FCH PCI Bridge (rev 40)
00:14.7 SD Host controller: Advanced Micro Devices, Inc. [AMD] FCH SD Flash Controller
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: sdhci-pci
00:15.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Hudson PCI to PCI bridge (PCIE port 0)
	Kernel driver in use: pcieport
00:15.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Hudson PCI to PCI bridge (PCIE port 1)
	Kernel driver in use: pcieport
00:15.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Hudson PCI to PCI bridge (PCIE port 3)
	Kernel driver in use: pcieport
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 0 (rev 43)
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 3
	Kernel driver in use: k10temp
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 6
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 5
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 12h/14h Processor Function 7
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
	Subsystem: ASUSTeK Computer Inc. Device 14b7
	Kernel driver in use: r8169
07:00.0 Network controller: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe
	Subsystem: Foxconn International, Inc. Device e054
	Kernel driver in use: rt2800pci

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@0000:06:00.0
       nom logique: eth0
       version: 07
       numéro de série: 50:46:5d:9a:0d:a6
       taille: 100Mbit/s
       capacité: 1Gbit/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 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=192.168.0.26 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       ressources: irq:47 portE/S:d000(taille=256) mémoire:d0004000-d0004fff mémoire:d0000000-d0003fff
  *-network
       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: 08:3e:8e:36:0d:75
       bits: 32 bits
       horloge: 33MHz
       fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rt2800pci driverversion=3.13.0-39-generic firmware=0.34 ip=192.168.0.16 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
       ressources: irq:19 mémoire:fe900000-fe90ffff

lsmod

Module                  Size  Used by
ctr                    13049  0 
ccm                    17773  0 
hid_generic            12548  0 
usbhid                 52659  0 
hid                   106148  2 hid_generic,usbhid
bnep                   19624  2 
rfcomm                 69160  0 
bluetooth             391136  10 bnep,rfcomm
nls_iso8859_1          12713  1 
snd_hda_codec_realtek    65580  1 
snd_hda_codec_hdmi     46368  1 
uvcvideo               80885  0 
videobuf2_vmalloc      13216  1 uvcvideo
videobuf2_memops       13362  1 videobuf2_vmalloc
videobuf2_core         40664  1 uvcvideo
videodev              134688  2 uvcvideo,videobuf2_core
snd_hda_intel          56451  5 
snd_hda_codec         192906  3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep              13602  1 snd_hda_codec
snd_pcm               102099  3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc         18710  2 snd_pcm,snd_hda_intel
snd_seq_midi           13324  0 
snd_seq_midi_event     14899  1 snd_seq_midi
snd_rawmidi            30144  1 snd_seq_midi
arc4                   12608  2 
rt2800pci              13606  0 
rt2800mmio             20986  1 rt2800pci
rt2800lib              89076  2 rt2800pci,rt2800mmio
rt2x00pci              13287  1 rt2800pci
snd_seq                61560  2 snd_seq_midi_event,snd_seq_midi
rt2x00mmio             13603  2 rt2800pci,rt2800mmio
rt2x00lib              55307  5 rt2x00pci,rt2800lib,rt2800pci,rt2800mmio,rt2x00mmio
kvm_amd                59987  0 
kvm                   451729  1 kvm_amd
snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
mac80211              630653  3 rt2x00lib,rt2x00pci,rt2800lib
snd_timer              29482  2 snd_pcm,snd_seq
joydev                 17381  0 
cfg80211              484040  2 mac80211,rt2x00lib
eeprom_93cx6           13344  1 rt2800pci
serio_raw              13462  0 
crc_ccitt              12707  1 rt2800lib
k10temp                13126  0 
radeon               1522640  3 
snd                    69322  21 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_seq_midi
ttm                    85150  1 radeon
parport_pc             32701  0 
drm_kms_helper         55071  1 radeon
i2c_piix4              22155  0 
ppdev                  17671  0 
drm                   303102  5 ttm,drm_kms_helper,radeon
soundcore              12680  1 snd
lp                     17759  0 
parport                42348  3 lp,ppdev,parport_pc
i2c_algo_bit           13413  1 radeon
wmi                    19177  0 
video                  19476  0 
mac_hid                13205  0 
pata_acpi              13038  0 
psmouse               106714  0 
ahci                   25819  3 
r8169                  67581  0 
sdhci_pci              23172  0 
mii                    13934  1 r8169
sdhci                  43015  1 sdhci_pci
libahci                32716  1 ahci
pata_atiixp            13271  0 

iwconfig

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

ifconfig

eth0      Link encap:Ethernet  HWaddr 50:46:5d:9a:0d:a6  
          inet adr:192.168.0.26  Bcast:192.168.0.255  Masque:255.255.255.0
          adr inet6: 2a01:e35:2eed:e800:5246:5dff:fe9a:da6/64 Scope:Global
          adr inet6: fe80::5246:5dff:fe9a:da6/64 Scope:Lien
          adr inet6: 2a01:e35:2eed:e800:6d50:1dd4:eb3a:8752/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:25975 erreurs:0 :0 overruns:0 frame:0
          TX packets:21487 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:28251632 (28.2 MB) Octets transmis:3006110 (3.0 MB)

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:3367 erreurs:0 :0 overruns:0 frame:0
          TX packets:3367 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          Octets reçus:358794 (358.7 KB) Octets transmis:358794 (358.7 KB)

wlan0     Link encap:Ethernet  HWaddr 08:3e:8e:36:0d:75  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          Packets reçus:36 erreurs:0 :0 overruns:0 frame:0
          TX packets:85 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:8677 (8.6 KB) Octets transmis:18677 (18.6 KB)

sudo iwlist scan

eth0      Interface doesn't support scanning.

lo        Interface doesn't support scanning.

wlan0     Scan completed :
          Cell 01 - Address: F4:CA:E5:AA:21:C8
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=39/70  Signal level=-71 dBm  
                    Encryption key:on
                    ESSID:"moustakaly"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000000a509bd711f
                    Extra: Last beacon: 88ms ago
                    IE: Unknown: 000A6D6F757374616B616C79
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 2D1A6C0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D160B000400000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
          Cell 02 - Address: F4:CA:E5:AA:21:C9
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=39/70  Signal level=-71 dBm  
                    Encryption key:off
                    ESSID:"FreeWifi"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000000a509bd391a
                    Extra: Last beacon: 88ms ago
                    IE: Unknown: 00084672656557696669
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: Unknown: 2D1A6C0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D160B000400000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
          Cell 03 - Address: 72:1F:9F:C0:C4:06
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=23/70  Signal level=-87 dBm  
                    Encryption key:off
                    ESSID:"Bouygues Telecom Wi-Fi"
                    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=0000011ce27adb5c
                    Extra: Last beacon: 88ms ago
                    IE: Unknown: 0016426F7579677565732054656C65636F6D2057692D4669
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030106
                    IE: Unknown: 2A0100
                    IE: Unknown: 2F0100
                    IE: Unknown: 32040C121860
                    IE: Unknown: DD090010180202F4040000
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 04 - Address: 00:1F:9F:C0:C4:05
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=25/70  Signal level=-85 dBm  
                    Encryption key:on
                    ESSID:"Bbox-8D5352"
                    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=0000011ce27ae16a
                    Extra: Last beacon: 88ms ago
                    IE: Unknown: 000B42626F782D384435333532
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030106
                    IE: Unknown: 2A0100
                    IE: Unknown: 2F0100
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32040C121860
                    IE: Unknown: DD7B0050F204104A00011010440001021041000100103B000103104700101872C8810A189A08ABF6696ADA868D3B1021000842726F6164636F6D1023000842726F6164636F6D1024000631323334353610420004313233341054000800060050F20400011011000A42726F6164636F6D4150100800020080103C000101
                    IE: Unknown: DD090010180202F4040000
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 05 - Address: 9A:1C:4E:D9:C9:44
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=35/70  Signal level=-75 dBm  
                    Encryption key:on
                    ESSID:"LINKSYS_007"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=000000776cd02d92
                    Extra: Last beacon: 88ms ago
                    IE: Unknown: 000B4C494E4B5359535F303037
                    IE: Unknown: 010882848B961224486C
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: Unknown: 32040C183060
                    IE: Unknown: 2D1A6E1017FFFF000001000000000000000000000000000000000000
                    IE: Unknown: 3D160B070600000000000000000000000000000000000000
                    IE: Unknown: 3E0100
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: 7F0101
                    IE: Unknown: DD07000C4300000000
                    IE: Unknown: DD1E00904C336E1017FFFF000001000000000000000000000000000000000000
                    IE: Unknown: DD1A00904C340B070600000000000000000000000000000000000000
          Cell 06 - Address: F4:CA:E5:AA:21:CA
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=39/70  Signal level=-71 dBm  
                    Encryption key:on
                    ESSID:"FreeWifi_secure"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000000a5058b8fc0
                    Extra: Last beacon: 7804ms ago
                    IE: Unknown: 000F46726565576966695F736563757265
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : 802.1x
                    IE: Unknown: 2D1A6C0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D160B000400000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
          Cell 07 - Address: 9A:1C:4E:D9:C9:45
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=35/70  Signal level=-75 dBm  
                    Encryption key:off
                    ESSID:"FreeWifi"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=00000077689ee333
                    Extra: Last beacon: 7788ms ago
                    IE: Unknown: 00084672656557696669
                    IE: Unknown: 010882848B961224486C
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: Unknown: 32040C183060
                    IE: Unknown: 2D1A6E1017FFFF000001000000000000000000000000000000000000
                    IE: Unknown: 3D160B070600000000000000000000000000000000000000
                    IE: Unknown: 3E0100
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: 7F0101
                    IE: Unknown: DD07000C4300000000
                    IE: Unknown: DD1E00904C336E1017FFFF000001000000000000000000000000000000000000
                    IE: Unknown: DD1A00904C340B070600000000000000000000000000000000000000
          Cell 08 - Address: 00:24:D4:61:FA:F4
                    Channel:3
                    Frequency:2.422 GHz (Channel 3)
                    Quality=21/70  Signal level=-89 dBm  
                    Encryption key:on
                    ESSID:"wifi_wissous"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000002e4eba68160
                    Extra: Last beacon: 1008ms ago
                    IE: Unknown: 000C776966695F776973736F7573
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 030103
                    IE: Unknown: 050401020000
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 2D1A6C0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D1603000400000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
          Cell 09 - Address: 00:24:D4:61:FA:F5
                    Channel:3
                    Frequency:2.422 GHz (Channel 3)
                    Quality=21/70  Signal level=-89 dBm  
                    Encryption key:off
                    ESSID:"FreeWifi"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000002e4eba68160
                    Extra: Last beacon: 976ms ago
                    IE: Unknown: 00084672656557696669
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 030103
                    IE: Unknown: 050400020000
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: Unknown: 2D1A6C0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D1603000400000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00

uname -r -m

3.13.0-39-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

NetworkManager Tool

State: connected (global)

- Device: wlan0 ----------------------------------------------------------------
  Type:              802.11 WiFi
  Driver:            rt2800pci
  State:             disconnected
  Default:           no
  HW Address:        08:3E:8E:36:0D:75

  Capabilities:

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points 
    FreeWifi_secure: Infra, F4:CA:E5:AA:21:CA, Freq 2462 MHz, Rate 54 Mb/s, Strength 55 WPA2 Enterprise
    moustakaly:      Infra, F4:CA:E5:AA:21:C8, Freq 2462 MHz, Rate 54 Mb/s, Strength 52 WPA
    FreeWifi_secure: Infra, 9A:1C:4E:D9:C9:46, Freq 2462 MHz, Rate 54 Mb/s, Strength 42 WPA Enterprise
    Bbox-8D5352:     Infra, 00:1F:9F:C0:C4:05, Freq 2437 MHz, Rate 54 Mb/s, Strength 22 WPA WPA2
    wifi_wissous:    Infra, 00:24:D4:61:FA:F4, Freq 2422 MHz, Rate 54 Mb/s, Strength 19 WPA
    FreeWifi:        Infra, F4:CA:E5:AA:21:C9, Freq 2462 MHz, Rate 54 Mb/s, Strength 52
    FreeWifi:        Infra, 9A:1C:4E:D9:C9:45, Freq 2462 MHz, Rate 54 Mb/s, Strength 49
    Bouygues Telecom Wi-Fi: Infra, 72:1F:9F:C0:C4:06, Freq 2437 MHz, Rate 54 Mb/s, Strength 19
    FreeWifi:        Infra, 00:24:D4:61:FA:F5, Freq 2422 MHz, Rate 54 Mb/s, Strength 19
    Free080253:      Infra, 00:24:D4:CD:C0:80, Freq 2452 MHz, Rate 54 Mb/s, Strength 12 WEP
    FreeWifi_secure: Infra, 00:24:D4:61:FA:F6, Freq 2422 MHz, Rate 54 Mb/s, Strength 15 WPA2 Enterprise
    Lavoisier:       Infra, 22:48:94:AA:8D:E0, Freq 2462 MHz, Rate 54 Mb/s, Strength 15 WEP
    FreeWifi:        Infra, 22:48:94:AA:8D:E2, Freq 2462 MHz, Rate 54 Mb/s, Strength 15


- Device: eth0  [Connexion filaire 1] ------------------------------------------
  Type:              Wired
  Driver:            r8169
  State:             connected
  Default:           yes
  HW Address:        50:46:5D:9A:0D:A6

  Capabilities:
    Carrier Detect:  yes
    Speed:           100 Mb/s

  Wired Properties
    Carrier:         on

  IPv4 Settings:
    Address:         192.168.0.26
    Prefix:          24 (255.255.255.0)
    Gateway:         192.168.0.254

    DNS:             212.27.40.240
    DNS:             212.27.40.241

  IPv6 Settings:
    Address:         2a01:e35:2eed:e800:6d50:1dd4:eb3a:8752
    Prefix:          64
    Gateway:         fe80::207:cbff:fe94:ba02

    Address:         2a01:e35:2eed:e800:5246:5dff:fe9a:da6
    Prefix:          64
    Gateway:         fe80::207:cbff:fe94:ba02

    Address:         fe80::5246:5dff:fe9a:da6
    Prefix:          64
    Gateway:         fe80::207:cbff:fe94:ba02

    DNS:             2a01:e00::2
    DNS:             2a01:e00::1

sudo rfkill list

0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no

Merci d'avance pour votre aide !

MAJ du 28/11/2014

Bonjour,

Je me permet de relancer mon post, est-ce que de nouvelles informations seraient nécessaires ?
Je suis toujours connecté à internet uniquement par câble, et donc uniquement chez moi.

Peut-être pouvez vous me conseiller une clé WIFI qui serait compatible avec mon Asus X401U-WX074H et avec ma version d'Ubuntu ?

Merci d'avance.

(Désolé pour le double post, impossible pour moi de le supprimer).

Dernière modification par pierrepatou (Le 28/11/2014, à 20:15)