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

> ----- Original Message -----
> From: "Dan Williams" <dcbw redhat com>
> To: "Robo Blaster" <ijustmadethisup mail com>
> Subject: Re: Limit on number of APs? Some way to force-rescan?
> Date: Wed, 12 Jul 2006 16:13:50 -0400
> On Wed, 2006-07-12 at 14:38 -0500, Robo Blaster wrote:
> > Thanks for the info on scan behaviour. I was worried, because my 
> > list wasn't changing. It may be that the madwifi driver's scan 
> > routine usually finds the same ones.
> >
> > > Wireless scans are never complete or reliable on _any_ platform.
> >
> > I meant to stress the comparison of using the AP_SCAN parameter 
> > in wpa_supplicant. Using wpa_supplicant directly, when AP_SCAN is 
> > 2, I get associated almost immediately. When it is 1, 
> > wpa_supplicant looks for a match in the truncated scan results, 
> > and almost always fails. I certainly don't blame NM if the 
> > wireless card doesn't return the AP I want, but maybe NM could 
> > fallback to AP_SCAN=2 if the first scan list returned to 
> > wpa_supplicant does not have an SSID match.
> I actually consider the AP_SCAN stuff in wpa_supplicant to be pretty
> much broken.  There is just no good rule on when to use 1 or 2, plus
> these bits of wpa_supplicant more or less duplicate what NM is doing
> already.  I forget the specifics of which drivers do and do not work
> with AP_SCAN 1 or 2, but it seems to me we should usually be using
> AP_SCAN = 2.  In fact, we used to use AP_SCAN = 2, but changed it in Feb
> to 1 because madwifi had problems with that.  Yay for madwifi.
> Dan

I'm using madwifi-0.9.1 and wpa_supplicant 0.5.4, so maybe this doesn't work for everybody, but I recompiled NM with ap_scan=2 and it works great. Now I quickly connect to APs I couldn't see before and even the ones I used before are faster. It's fantastic.

I understand if you don't move to this right away due to other considerations, but this madwifi user recommends it.


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