Bonjour,
Du jour au lendemain, alors que tout tournait aux petits oignons depuis des mois, bim ! panne de réseau : wifi activé, connexion OK mais pas d'internet. Après pas mal de farfouillis par-ci par-là, je tombe sur plein de trucs (et donc pleins d'essais infructueux), dont au final le problème de DNS.
En ajoutant les DNS de Free au fichier /etc/resolvconf, la connexion fonctionne, mais avec une piètre qualité (souvent très lente et avec un temps de réponse super long, sauf dans les minutes qui suivent une reconnexion forcée au réseau).
Comme je suis amené à bouger, je ne peux me contenter de figer ma connexion paramétrée pour un seul réseau.
Et un plus, du coup, c'est la connexion VPN qui ne fonctionne plus (elle n'accroche pas...).
J'ai changé le mode WPA, testé en DHCP, en IP fixe, vérifié les paramètres routeur/wifi de la box, etc., et je n'ai pas vraiment trouvé mon bonheur sur la toile, à savoir revenir à l'état initial où tout fonctionnait parfaitement.
La connexion n'est pas en cause puisque ça marche toujours très bien sur mon autre machine (toujours en wifi).
Bref, c'est aussi pénalisant qu'inexpliqué.
Une idée lumineuse ?
Voilà le résultat du wificheck :
>> cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.4 LTS"
>> lsusb
Bus 002 Device 004: ID 04f2:b315 Chicony Electronics Co., Ltd
Bus 002 Device 003: ID 0483:91d1 STMicroelectronics
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 8087:07da Intel Corp.
Bus 001 Device 003: ID 03eb:8206 Atmel Corp.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> lspci -k -nn | grep -A 3 -i net
03:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 2230 [8086:0888] (rev c4)
Subsystem: Intel Corporation Centrino Wireless-N 2230 BGN [8086:4262]
Kernel driver in use: iwlwifi
04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
Subsystem: Lenovo Device [17aa:2205]
Kernel driver in use: r8169
>> sudo lshw -C network
*-network
description: Interface réseau sans fil
produit: Centrino Wireless-N 2230
fabriquant: Intel Corporation
identifiant matériel: 0
information bus: pci@0000:03:00.0
nom logique: wlan0
version: c4
numéro de série: 60:6c:66:63:f0:fb
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-77-generic firmware=18.168.6.1 ip=192.168.0.10 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
ressources: irq:48 mémoire:f1d00000-f1d01fff
*-network
description: Ethernet interface
produit: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
fabriquant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:04:00.0
nom logique: eth0
version: 07
numéro de série: 20:89:84:d3:e3:25
taille: 10Mbit/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=half firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
ressources: irq:44 portE/S:2000(taille=256) mémoire:f0c04000-f0c04fff mémoire:f0c00000-f0c03fff
>> lsmod
Module Size Used by
usb_storage 62209 0
msr 12865 0
acpi_call 12714 0
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
btusb 32412 0
hid_multitouch 17407 0
hid_sensor_magn_3d 13209 0
hid_sensor_als 13123 0
hid_sensor_gyro_3d 13209 0
hid_sensor_accel_3d 13221 0
hid_sensor_trigger 12916 8 hid_sensor_gyro_3d,hid_sensor_accel_3d,hid_sensor_als,hid_sensor_magn_3d
industrialio_triggered_buffer 12882 4 hid_sensor_gyro_3d,hid_sensor_accel_3d,hid_sensor_als,hid_sensor_magn_3d
kfifo_buf 13379 1 industrialio_triggered_buffer
industrialio 54069 7 hid_sensor_trigger,hid_sensor_gyro_3d,industrialio_triggered_buffer,hid_sensor_accel_3d,hid_sensor_als,kfifo_buf,hid_sensor_magn_3d
hid_sensor_iio_common 13755 4 hid_sensor_gyro_3d,hid_sensor_accel_3d,hid_sensor_als,hid_sensor_magn_3d
hid_sensor_hub 19536 6 hid_sensor_trigger,hid_sensor_gyro_3d,hid_sensor_accel_3d,hid_sensor_als,hid_sensor_magn_3d,hid_sensor_iio_common
pci_stub 12622 1
vboxpci 23194 0
vboxnetadp 25670 0
vboxnetflt 27830 0
vboxdrv 414452 4 vboxnetadp,vboxnetflt,vboxpci
cuse 13445 3
dm_crypt 23177 0
bnep 19624 2
rfcomm 69160 8
bluetooth 391136 22 bnep,btusb,rfcomm
arc4 12608 2
iwldvm 232285 0
mac80211 630728 1 iwldvm
intel_rapl 18773 0
x86_pkg_temp_thermal 14205 0
intel_powerclamp 14705 0
coretemp 13435 0
kvm_intel 143187 0
kvm 455843 1 kvm_intel
dm_multipath 22873 0
scsi_dh 14882 1 dm_multipath
crct10dif_pclmul 14289 0
crc32_pclmul 13113 0
snd_hda_codec_hdmi 46368 1
aesni_intel 55624 0
snd_hda_codec_realtek 65904 1
aes_x86_64 17131 1 aesni_intel
lrw 13286 1 aesni_intel
gf128mul 14951 1 lrw
glue_helper 13990 1 aesni_intel
ablk_helper 13597 1 aesni_intel
cryptd 20359 2 aesni_intel,ablk_helper
snd_hda_intel 56531 3
snd_hda_codec 193017 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
rtsx_pci_ms 18151 0
snd_hwdep 13602 1 snd_hda_codec
iwlwifi 169932 1 iwldvm
memstick 16966 1 rtsx_pci_ms
joydev 17381 0
snd_pcm 102099 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
nfsd 284385 2
cfg80211 484040 3 iwlwifi,mac80211,iwldvm
auth_rpcgss 59338 1 nfsd
nfs_acl 12837 1 nfsd
serio_raw 13462 0
nfs 236726 0
lockd 93941 2 nfs,nfsd
lpc_ich 21080 0
binfmt_misc 17468 1
sunrpc 289260 6 nfs,nfsd,auth_rpcgss,lockd,nfs_acl
snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
shpchp 37032 0
mei_me 18627 0
mei 82276 1 mei_me
nls_iso8859_1 12713 1
nls_utf8 12557 0
cifs 462779 0
fscache 63988 2 nfs,cifs
thinkpad_acpi 81013 1
nvram 14411 1 thinkpad_acpi
snd_seq_midi 13324 0
snd_seq_midi_event 14899 1 snd_seq_midi
snd_rawmidi 30144 1 snd_seq_midi
snd_seq 61560 2 snd_seq_midi_event,snd_seq_midi
parport_pc 32701 0
snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 29482 2 snd_pcm,snd_seq
ppdev 17671 0
snd 69322 18 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,thinkpad_acpi,snd_seq_device,snd_seq_midi
vhba 18004 0
soundcore 12680 1 snd
lp 17759 0
parport 42348 3 lp,ppdev,parport_pc
mac_hid 13205 0
dm_mirror 22135 0
dm_region_hash 20862 1 dm_mirror
dm_log 18411 2 dm_region_hash,dm_mirror
hid_generic 12548 0
usbhid 52659 0
hid 106148 4 hid_multitouch,hid_generic,hid_sensor_hub,usbhid
rtsx_pci_sdmmc 23274 0
i915 788212 4
psmouse 106692 0
i2c_algo_bit 13413 1 i915
drm_kms_helper 55071 1 i915
ahci 34091 3
drm 303102 5 i915,drm_kms_helper
libahci 32716 1 ahci
r8169 71677 0
mii 13934 1 r8169
rtsx_pci 46245 2 rtsx_pci_ms,rtsx_pci_sdmmc
wmi 19177 0
video 19476 1 i915
>> iwconfig
wlan0 IEEE 802.11bgn ESSID:"freebox_maison"
Mode:Managed Frequency:2.412 GHz Access Point: 76:D9:AC:11:16:84
Bit Rate=54 Mb/s Tx-Power=16 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=38/70 Signal level=-72 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:7 Invalid misc:216 Missed beacon:0
>> ifconfig -a
eth0 Link encap:Ethernet HWaddr 20:89:84:d3:e3:25
UP 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)
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:9596 erreurs:0 :0 overruns:0 frame:0
TX packets:9596 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:0
Octets reçus:777766 (777.7 KB) Octets transmis:777766 (777.7 KB)
wlan0 Link encap:Ethernet HWaddr 60:6c:66:63:f0:fb
inet adr:192.168.0.10 Bcast:192.168.0.255 Masque:255.255.255.0
adr inet6: fe80::626c:66ff:fe63:f0fb/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:10555 erreurs:0 :0 overruns:0 frame:0
TX packets:10437 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:8503036 (8.5 MB) Octets transmis:1540240 (1.5 MB)
>> sudo iwlist scan
wlan0 Scan completed :
Cell 01 - Address: 76:D9:AC:11:16:84
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=49/70 Signal level=-61 dBm
Encryption key:on
ESSID:"freebox_maison"
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=00000000a7f44116
Extra: Last beacon: 96ms ago
IE: Unknown: 000E66726565626F785F6D6169736F6E
IE: Unknown: 010882848B961224486C
IE: Unknown: 030101
IE: Unknown: 2A0104
IE: Unknown: 32040C183060
IE: Unknown: 2D1A6E1017FFFF000001000000000000000000000000000000000000
IE: Unknown: 3D1601050700000000000000000000000000000000000000
IE: Unknown: 3E0100
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: 7F0101
IE: Unknown: DD07000C4300000000
IE: Unknown: DD1E00904C336E1017FFFF000001000000000000000000000000000000000000
IE: Unknown: DD1A00904C3401050700000000000000000000000000000000000000
>> uname -r -m
3.13.0-77-generic x86_64
>> cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
#auto wlan0
#iface wlan0 inet dhcp
>> nm-tool
NetworkManager Tool
State: connected (global)
- Device: 48:60:BC:3F:ED:CF ----------------------------------------------------
Type: Bluetooth
Driver: bluez
State: disconnected
Default: no
Capabilities:
- Device: 00:23:F1:D3:17:07 ----------------------------------------------------
Type: Bluetooth
Driver: bluez
State: disconnected
Default: no
Capabilities:
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: r8169
State: unavailable
Default: no
HW Address: 20:89:84:D3:E3:25
Capabilities:
Carrier Detect: yes
Wired Properties
Carrier: off
- Device: wlan0 [freebox_maison] ----------------------------------------------
Type: 802.11 WiFi
Driver: iwlwifi
State: connected
Default: yes
HW Address: 60:6C:66:63:F0:FB
Capabilities:
Speed: 54 Mb/s
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points (* = current AP)
*freebox_maison: Infra, 76:D9:AC:11:16:84, Freq 2412 MHz, Rate 54 Mb/s, Strength 49 WPA
IPv4 Settings:
Address: 192.168.0.10
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.254
DNS: 212.27.40.240
DNS: 212.27.40.241
>> sudo rfkill list
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
