On Sat, Apr 19, 2008 at 1:39 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote: > 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). > First of all we have some scanning fixes coming soon Second the 3954 and 4965 my uCode may crash intentionally if you send probe requests on a passive channel.according EEPROM. I personally wish to not make SW scanning possible at all for that reason. Third the scanning on passive channels is a bit conservative we need to changed that in the FW. At last iwlwifi HW scanning can handle up to 4 essids for direct scan but currently wireless tools interface cannot utilize this. Tomas > johannes > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
