I'm sending this email without cable, Thanks!
I'm not sure to understand what happened...
I moved my computer by ~1 meter and it worked.
Then noise still equals the signal but they are now at -47 dBm.
Also the connection seems to be unstable and sometimes the iwlist 
comment doesn't find anything.
Other people in the same room receive the wifi with 5/5 quality.
Could this be a hardware problem?

Thanks again
fg


Beyerle Urs a écrit :
> Frederic Boone wrote:
>> Thanks for the quick answer
>>> Do you see your access point, if you do a scan?
>>>
>>> # iwlist eth1 scan
>>
>> Yes! I got:
>>
>> # /sbin/iwlist eth1 scan
>> eth1      Scan completed :
>>          Cell 01 - Address: 00:00:00:B5:FB:00
>>                    ESSID:"observatoire-portail"
>>                    Protocol:IEEE 802.11bg
>>                    Mode:Master
>>                    Channel:9
>>                    Encryption key:off
>>                    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=51/100  Signal level=-78 dBm  Noise 
>> level=-78 dBm
>
>
> Your "Signal level" is equal your "Noise level"? Which is not really 
> good.
> Can you move closer to your access point?
>
>
>
>
>>                    Extra: Last beacon: 11192ms ago
>>>
>>> If yes, for example use "system-config-network" to configure your 
>>> wireless settings.
>>
>> So I set the mode to Master and channel to 9 but then I get:
>> "Error for wireless request "Set Mode" (8B06) :
>>    SET failed on device eth1 ; Invalid argument."
>> "Définition des informations IP pour eth1. échoué. Aucun lien n'a été 
>> trouvé. Vérifier le câble ?"
>>
>> Do you know why?
>
>
> Please try
> Mode: Managed  (!)
> Network name (SSID): Specified: observatoire-portail
> Key "empty"
>
> # ifup eth1
>
> What shows
>
> # iwconfig eth1
>
>
> Urs
>
>
>
>> Thanks a lot.
>>
>> fb
>>
>