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Re: [PATCH 001/002] [MAC80211] Retry probe request few times

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On Wed, 2009-08-05 at 08:29 +0300, Maxim Levitsky wrote:

> > [54632.657912] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 1
> > [54633.154560] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 2
> > [54873.231210] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 1
> > [55113.467840] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 1
> > [55113.964510] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 2
> > [55114.464516] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 3
> > [55114.967868] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 4
> > [55115.464511] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, disconnecting.
> > 
> > Should we increase the value to 8 or something? Or just accept that
> > sometimes we get a disconnect?
> > 
> I think a disconnect or two aren't a problem, they are always handled
> automatically, and can be caused by natural events.
> 
> Even without these patches (I have WPA2, and disconnects were every 4
> five seconds), and still it was possible to use network.
> 
> One disconnect in a day is really nothing to worry about (I have seen
> such here as well)
> 
> You can increase try count, probably won't hurt much (each try is 0.5
> seconds, so even 10 tries gives total of 5 seconds, before disconnect on
> a really unaccessible AP, anyway)

Mind you, each try will end up sending a LOT of probe request frames,
iwlwifi sends like 12 frames for every try and never gets a response for
some reason, so I wouldn't really increase it much further since you'd
be spamming around a lot.

johannes

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