On Tue, Apr 10, 2007 at 19:41:22 -0400, Grok Mogger wrote:
> Florian Kulzer wrote:
[ short summary: The card is recognized as ath0 with wireless extensions,
but it does not associate with any access point, lists "Signal level:
0/94". This is on Ubuntu Edgy. ]
[...]
> When I try to scan, I always get no results. The irritating thing is that
> at one time I just magically started getting results. I picked up all three
> nearby wireless networks in my area. I still could not connect to anything,
> and one of the three is even wide open, completely unencrypted. In the
> course of messing with things in an attempt to connect to something, I am
> back to where I started. If I do a "sudo iwlist ath0 scan" or a "sudo
> wlanconfig ath0 list scan", I get nothing. (I'm typing the output by hand
> obviously, but this is exactly what it says)
>
> $ sudo iwlist ath0 scan
> ath0 No scan results
This might just mean that the access points in your area have too weak a
signal to work. Do you remember what signal level was listed when you
did see the access points? Weak signals from far-away access points
would result in exactly the behavior that you describe: Access points
drifting in and out, no association possible even if your wireless card
works correctly. If we are talking about a laptop it might help to walk
around in your apartment a bit or to just take it to an internet café.
It will be very difficult to track down the issue if you are not certain
that you have a strong and reliable access point nearby. Ideally this
should be your own access point, of course...
> $ sudo wlanconfig ath0 list scan
> $ [Nothing appears here, just a prompt]
I don't know this command, so I cannot comment on that.
> If I do a "sudo iwconfig ath0 essid "GrokMogger" ", then I see no output,
> but then a "sudo iwconfig" shows me that my ESSID on ath0 is indeed now
> "GrokMogger".
100% the expected behavior.
> I just did a "dmesg | egrep 'ath0|madwifi' " and the output was just one
> line.
> "[ 83.523316] ath0: no IPv6 routers present"
No error messages at least. I would have expected to see a few more
lines, but maybe this is normal for madwifi-driven cards.
> I'm still reading like a fiend and trying things on my own, but this is my
> third day working on this and I still have not made any progress. (That I
> didn't somehow ruin later) So I really appreciate the help. =) This is
> obviously way over my head.
It may also be over my head since I have no specific knowledge of your
type of card or the wifi-related peculiarities of Ubuntu. At the moment
it looks to me like your card might very well be working as it should.
You need to find a reliable access point at close range to determine if
the scanning works.
--
Regards,
Florian
