Problème WiFi WPA

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Auteur: Yves Martin
Date:  
À: guilde
Sujet: Problème WiFi WPA
Bonjour,

J'utilise une Mandriva 2008.0 sur mon DELL Inspiron 1521 avec un
mini-carte Broadcom BCM94311MCG configuré par ndiswrapper/bcmwl5
Tout a bien fonctionné jusqu'à maintenant sur mon routeur (WPA) et sur
d'autres (famille avec WEP et WPA)

Mais depuis récemment, la connection ne veut plus s'établir:

wpa_supplicant en boucle dans wpa_cli:
<2>Trying to associate with 00:90:d0:e9:a7:3b (SSID='SpeedTouchE78E34'
freq=2432 MHz)
<2>Associated with 00:90:d0:e9:a7:3b
<2>Authentication with 00:90:d0:e9:a7:3b timed out.
<2>CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys

$ ps -ef | grep eth
root     16390     1  0 21:48 ?        00:00:00 /usr/sbin/wpa_supplicant
-B -i eth0 -c /etc/wpa_supplicant.conf -D wext
root     16392     1  0 21:48 ?        00:00:00 /sbin/ifplugd -b -i eth0
root     16415 16392  3 21:48 ?
00:00:00 /bin/bash /etc/sysconfig/network-scripts/ifup-eth ifcfg-eth0
onlink
root     16462 16415  0 21:48 ?        00:00:00 dhclient -1 -q
-lf /var/lib/dhcp/dhclient-eth0.leases -pf /var/run/dhclient-eth0.pid
-cf /etc/dhclient-eth0.conf eth0


Dans dmesg:
ndiswrapper version 1.47 loaded (smp=yes)
ndiswrapper (link_pe_images:576): fixing KI_USER_SHARED_DATA address in
the driver
ndiswrapper: driver bcmwl5 (Broadcom,03/23/2006, 4.40.19.0) loaded
ACPI: PCI Interrupt 0000:0b:00.0[A] -> GSI 17 (level, low) -> IRQ 17
PCI: Setting latency timer of device 0000:0b:00.0 to 64
ndiswrapper: using IRQ 17
wlan0: ethernet device 00:1e:4c:05:54:01 using NDIS driver: bcmwl5,
version: 0x4281300, NDIS version: 0x501, vendor: 'NDIS Network Adapter',
14E4:4311.5.conf
wlan0: encryption modes supported: WEP; TKIP with WPA, WPA2, WPA2PSK;
AES/CCMP with WPA, WPA2, WPA2PSK
usbcore: registered new interface driver ndiswrapper
ndiswrapper: changing interface name from 'wlan0' to 'eth0'
udev: renamed network interface wlan0 to eth0
ADDRCONF(NETDEV_UP): eth0: link is not ready
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
eth0: no IPv6 routers present

# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:1E:4C:05:54:01  
          inet6 addr: fe80::21e:4cff:fe05:5401/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:190 errors:0 dropped:0 overruns:0 frame:0
          TX packets:202 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:25650 (25.0 KiB)  TX bytes:28170 (27.5 KiB)
          Interrupt:17 Memory:fe8fc000-fe900000 


# iwconfig (alternativement:)
eth0      IEEE 802.11g  ESSID:"SpeedTouchE78E34"  Nickname:"inspiron"
          Mode:Managed  Frequency:2.432 GHz  Access Point:
00:90:D0:E9:A7:3B   
          Bit Rate=54 Mb/s   Tx-Power:32 dBm   
          RTS thr:2347 B   Fragment thr:2346 B   
          Encryption key:off
          Power Management:off
          Link Quality:75/100  Signal level:-48 dBm  Noise level:-96 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:9  Invalid misc:102   Missed beacon:0


eth0      IEEE 802.11g  ESSID:off/any  Nickname:"inspiron"
          Mode:Managed  Frequency:2.432 GHz  Access Point:
Not-Associated   
          Bit Rate:54 Mb/s   Tx-Power:32 dBm   
          RTS thr:2347 B   Fragment thr:2346 B   
          Encryption key:off
          Power Management:off
          Link Quality:78/100  Signal level:-46 dBm  Noise level:-96 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:12  Invalid misc:116   Missed beacon:0


Sur Kernel 2.6.22.12-laptop, ndiswrapper 1.47, wpa_supplicant 0.6.0,
shorewall actif mais aucun log de rejet (pas de changement de conf
d'ailleurs).

J'ai essayé beaucoup de choses (ifdown/ifup, désinstallation du driver
dans ndiswrapper, rmmod, reboot...) mais rien n'y fait.

Pouvez-vous m'aider ? Comment analyser pour trouver la cause et
corriger ? Merci d'avance.

--
Yves Martin