Re: iwlwifi: Really hard to connect to networks

On Sat, 30 Aug 2025, ltning-freebsd-wireless@anduin.net wrote:

>> Yes, I saw that too.  If it happens again after the update wee need to
>> see. Could be from changing bands; I need to go and have a look about
>> that.  If it was crypto related there's also a catch for that in main.
>
> Attached dmesg from boot right now. The interface did not come up properly 
> until I did a "service netif restart wlan0" (not included in the dmesg).
>
> Gotta run now, can collect more debug info later.. Hope this helps, though!

So two issues:

(1) you see beacons yet the firmware says you are not...

iwlwifi0: Not associated and the session protection is over already...
iwlwifi0: linuxkpi_ieee80211_connection_loss: vif 0xfffffe01e11f0f00 vap 0xfffffe01e11f0010 state AUTH (synched 1, assoc 0 beacons 13 dtim_period 1)
wlan0: link state changed to UP
iwlwifi0: linuxkpi_ieee80211_beacon_loss: vif 0xfffffe01e11f0f00 vap 0xfffffe01e11f0010 state RUN (synched 1, assoc 1 beacons 4 dtim_period 1)
wlan0: link state changed to DOWN
iwlwifi0: Not associated and the session protection is over already...
iwlwifi0: linuxkpi_ieee80211_connection_loss: vif 0xfffffe01e11f0f00 vap 0xfffffe01e11f0010 state AUTH (synched 1, assoc 0 beacons 6 dtim_period 1)

As you can see:
(a) in all cases LinuxKPI 802.11 thinks it is in synch with net8011
(b) in all cases we have received beacons
(c) in the middle case we are still assoc (RUN state) as it is a
     beacon loss reported by firmware/driver
(d) in all cases we do have a dtim period set.

  I wonder why in the AUTH state.  LinuxKPI does reset it.
Seems like we should only update from net80211 if we get assoc
as net80211 will always have it set after scan.  I'll prepare a
patch.
The reason is that (at least for iwlwifi) that change notification
will be checked to my memory and if it happend earlier there's no
more state change.


(2) firmware crash after this due to ampdu-rx;  I thought that is
     disabled but I have a further change to put in to help this;

Hope to make both during Monday, so yes, your log helps!
Thanks a lot for updating and testing and reporting back.

/bz

-- 
Bjoern A. Zeeb                                                     r15:7