Re: Limit on number of APs? Some way to force-rescan?

[Derek Atkins <warlord MIT EDU>]

Quoting Dan Williams <dcbw redhat com>:

> Hmm.  I blame madwifi :)  Ok, just kidding.

hahahaha..

> However, I was just at a Hyatt in San Diego last weekend, and there were
> a _ton_ of access points there.  > 30.  And ipw2200 displayed them all,
> and I could even connect to some.  The differences between your setup
> and mine are, of course, (a) ipw2200 vs. madwifi-ng and (b) you have
> 802.11a and I don't.

Okay...  And how many different ESSIDs out of those 30 APs?  And how many
of those ESSIDs did nm-applet display?

> It could be that madwifi doesn't do a good job of caching the scan
> results, since both NM and wpa_supplicant will request the results when
> they get notification that a scan event has completed.  Some drivers,
> most notably old ones, won't survive two processes requesting scan
> results around the same time.  But I wouldn't expect madwifi to have
> that issue, though it might.

I don't know.  I can run "iwlist ath0 scan" multiple times, over and
over, and get the full list of APs.  That list contains 15 APs right
now.

> An interesting thing to do would be to write a small application that
> listens to netlink events, and when the scan result event comes in, try
> to grab scan results and compare those results with the ones that
> NetworkManager retrieves.

How do I find the list that NM retrieves?  Does it log the list anywhere?
I just find it odd that the list in the pulldown doesn't match the list
I see in "iwlist ath0 scan".

I'm about to move location, so I bet that as soon as I do this problem will
go away because there will be an 'a' network AP earlier in the scan list
and therefore NM will see it.  At least, that's my guess.  I don't know.

> Dan

-derek

--
      Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
      Member, MIT Student Information Processing Board  (SIPB)
      URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
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