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telliac

Intermittent du Wifi (bien sur avec 9.10)

A vue de nez, si j'en crois les nombreux posts sur le forum, je devrais me considérer comme heureux : Ma carte wifi est bien detectée par Karmic, mon réseau est présent, je me connecte... Bref tout va bien ou presque...

Enfin un "presque" très handicapant tout de meme, puisque je ne réussis pas à rester connecté plus de deux minutes consécutives. Et a chaque fois il me faut attendre la reconnection et l'obtention de l'IP qui prend du temps.

Comme tout le monde, tout allait bien jusqu'ici, mon PC a connu les différentes versions d'Ubuntu sans problème depuis au moins Edgy et le wifi a toujours bien fonctionné.
J'ai suivi plusieurs conseils piochés ici ou là sur les forums (viré network-manager pour wicd, fait un "rfkill unblock all", et autres...) mais ça n'a pas l'air d'aller mieux.

Voici les résultats des commandes :

cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=9.10
DISTRIB_CODENAME=karmic
DISTRIB_DESCRIPTION="Ubuntu 9.10"

# sudo lshw -C network
  *-network:0             
       description: Ethernet interface
       product: RTL-8139/8139C/8139C+
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 1
       bus info: pci@0000:06:01.0
       logical name: eth0
       version: 10
       serial: 00:16:d4:22:02:7a
       size: 10MB/s
       capacity: 100MB/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=half latency=32 link=no maxlatency=64 mingnt=32 multicast=yes port=MII speed=10MB/s
       resources: irq:21 ioport:5000(size=256) memory:bc006000-bc0060ff
  *-network:1
       description: Wireless interface
       product: PRO/Wireless 2200BG [Calexico2] Network Connection
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:06:02.0
       logical name: eth1
       version: 05
       serial: 00:16:6f:8b:87:73
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=ipw2200 driverversion=1.2.2kmprq firmware=ABG:9.0.5.27 (Dec 12 2007) latency=32 link=yes maxlatency=24 mingnt=3 multicast=yes wireless=IEEE 802.11g
       resources: irq:22 memory:bc007000-bc007fff

 # lsmod 
Module                  Size  Used by
arc4                    1660  0 
ecb                     2524  0 
lib80211_crypt_wep      3708  0 
binfmt_misc             8356  1 
nfsd                  241100  9 
lockd                  67724  1 nfsd
nfs_acl                 2844  1 nfsd
auth_rpcgss            36576  1 nfsd
sunrpc                191712  8 nfsd,lockd,nfs_acl,auth_rpcgss
exportfs                4412  1 nfsd
ppdev                   6688  0 
snd_usb_usx2y          25088  4 
snd_usb_lib            16284  1 snd_usb_usx2y
snd_hwdep               7200  2 snd_usb_usx2y
snd_intel8x0           30168  0 
snd_ac97_codec        101216  1 snd_intel8x0
dm_crypt               12928  0 
ac97_bus                1532  1 snd_ac97_codec
snd_pcm_oss            37920  0 
snd_mixer_oss          16028  1 snd_pcm_oss
snd_pcm                75296  5 snd_usb_usx2y,snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_seq_dummy           2656  0 
snd_seq_oss            28576  0 
snd_seq_midi            6432  0 
pcmcia                 36808  0 
sbp2                   22888  0 
snd_rawmidi            22208  2 snd_usb_lib,snd_seq_midi
snd_seq_midi_event      6940  2 snd_seq_oss,snd_seq_midi
usblp                  12636  0 
ipw2200               140292  0 
snd_seq                50224  7 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
yenta_socket           24200  1 
libipw                 43148  1 ipw2200
snd_timer              22276  2 snd_pcm,snd_seq
snd_seq_device          6920  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
rsrc_nonstatic         11644  1 yenta_socket
sdhci_pci               7100  0 
sdhci                  17472  1 sdhci_pci
tifm_7xx1               5372  0 
tifm_core               7832  1 tifm_7xx1
led_class               4096  1 sdhci
iptable_filter          3100  0 
joydev                 10272  0 
lib80211                6432  3 lib80211_crypt_wep,ipw2200,libipw
lp                      8964  0 
ip_tables              11692  1 iptable_filter
pcmcia_core            35792  3 pcmcia,yenta_socket,rsrc_nonstatic
snd                    59204  20 snd_usb_usx2y,snd_hwdep,snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
x_tables               16544  1 ip_tables
soundcore               7264  1 snd
psmouse                56180  0 
serio_raw               5280  0 
parport                35340  2 ppdev,lp
snd_page_alloc          9156  3 snd_usb_usx2y,snd_intel8x0,snd_pcm
raid10                 22972  0 
raid456                54108  0 
raid6_pq               80912  1 raid456
async_xor               3260  1 raid456
async_memcpy            1820  1 raid456
async_tx                3324  3 raid456,async_xor,async_memcpy
raid1                  22396  0 
raid0                   8096  0 
multipath               7744  0 
linear                  5184  0 
dm_raid45              84228  0 
xor                    15620  3 raid456,async_xor,dm_raid45
fbcon                  36640  72 
tileblit                2460  1 fbcon
font                    8124  1 fbcon
bitblit                 5372  1 fbcon
softcursor              1756  1 bitblit
8139too                22620  0 
usbhid                 38208  0 
usb_storage            52544  1 
i915                  221064  2 
drm                   159584  2 i915
i2c_algo_bit            5760  1 i915
8139cp                 19260  0 
mii                     5212  2 8139too,8139cp
ohci1394               29900  0 
ieee1394               86596  2 sbp2,ohci1394
intel_agp              27484  2 i915
agpgart                34988  2 drm,intel_agp
video                  19380  1 i915
output                  2780  1 video

# iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

eth1      IEEE 802.11g  ESSID:"Luvigwifi"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: 00:0F:A3:DF:FD:5C   
          Bit Rate:54 Mb/s   Tx-Power=20 dBm   Sensitivity=8/0  
          Retry limit:7   RTS thr:off   Fragment thr:off
          Encryption key:FECA-00BA-BE   Security mode:open
          Power Management:off
          Link Quality=0/100  Signal level=-55 dBm  Noise level=-86 dBm
          Rx invalid nwid:0  Rx invalid crypt:1168  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:15   Missed beacon:85

ifconfig  
eth0      Link encap:Ethernet  HWaddr 00:16:d4:22:02:7a  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          Packets re�us: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 re�us:0 (0.0 B) Octets transmis:0 (0.0 B)
          Interruption:21 Adresse de base:0x5000 

eth1      Link encap:Ethernet  HWaddr 00:16:6f:8b:87:73  
          inet adr:192.168.0.2  Bcast:192.168.0.255  Masque:255.255.255.0
          adr inet6: fe80::216:6fff:fe8b:8773/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets re�us:50190 erreurs:1175 :1192 overruns:0 frame:0
          TX packets:105888 errors:0 dropped:10622 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets re�us:33464339 (33.4 MB) Octets transmis:27739979 (27.7 MB)
          Interruption:22 Adresse de base:0xe000 M�moire:bc007000-bc007fff 

lo        Link encap:Boucle locale  
          inet adr:127.0.0.1  Masque:255.0.0.0
          adr inet6: ::1/128 Scope:H�te
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          Packets re�us:624839 erreurs:0 :0 overruns:0 frame:0
          TX packets:624839 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          Octets re�us:477502854 (477.5 MB) Octets transmis:477502854 (477.5 MB)

# sudo iwlist scan
lo        Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

eth1      Scan completed :
          Cell 01 - Address: 00:0F:A3:DF:FD:5C
                    ESSID:"Luvigwifi"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.462 GHz (Channel 11)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Quality=70/100  Signal level=-59 dBm  
                    Extra: Last beacon: 2704ms ago

# uname -r -m
2.6.31-14-generic i686

# cat /etc/network/interfaces 
auto lo
iface lo inet loopback


iface eth0 inet dhcp


auto wlan0
iface wlan0 inet dhcp






iface eth1 inet dhcp
wireless-key **********
wireless-essid luvigwifi

Quelqu'un a-t-il une idée ?
Merci (le temps de taper ce message, je me suis reconnecté au moins six fois)