[Bug 264238] WiFi stops working after upgrade from 13.0 to 13.1, AR9285

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264238

J.R. Oldroyd <fbsd@opal.com> changed:

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--- Comment #15 from J.R. Oldroyd <fbsd@opal.com> ---
(In reply to Jaskie from comment #14)

I wouldn't close the PR until the problem is resolved.

What you could do at this point is look at a detailed dump of the packets on
both the working and the non-working systems.

Do the tcpdump similar to what was proposed before:
    disable DHCP in /etc/rc.conf (ifconfig_wlan0="..." should not have DHCP in
it)
    service netif stop wlan0
    tcpdump -i wlan0 -w file.bpf -s 0
    service netif start wlan0
then view using:
    tcpdump -r file.bpf -vvv port 67 or 68

Make sure that you're using the same bssid both times so that the comparison is
useful (e.g., use a "bssid=xx:xx:xx:xx:xx:xx" in your wpa_supplicant.conf).

There has to be some difference between what is sent.  Or there has to be
something blocking the DHCP datagrams from reaching the router.  Or blocking
the responses.

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