Subject: Re:  RE: iwl3945 problem with 2.6.25-rc9
From: Johannes Berg <johannes@sipsolutions.net>
To: Brian Morrison <bdm@fenrir.org.uk>
Cc: linux-wireless@vger.kernel.org
In-Reply-To: <1208558255.4848.60.camel@johannes.berg> (sfid-20080418_233741_985617_9465C786)
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Date: Sat, 19 Apr 2008 00:39:42 +0200
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On Sat, 2008-04-19 at 00:37 +0200, Johannes Berg wrote:

> What I've found (a long time ago with hostapd) is that some APs are slow
> and the firmware-assisted scanning has a too small dwell period. Maybe
> we should have a module option for that so we can ask people to change
> that in such cases? You could try to change the IWL_ACTIVE_DWELL_TIME_24
> (and/or IWL_ACTIVE_DWELL_TIME_52) to higher values and maybe setting
> IWL_PLCP_QUIET_THRESH to 0.

Just as a datapoint, mac80211's sw scanning uses about 30 msec for
active and 200 for passive (on both bands).

johannes

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