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

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 05 Jun 2022 20:29:18 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264238

--- Comment #37 from rkoberman@gmail.com ---
I am surprised to see this issue as the initial message showed both 13.1 and
13.0 to be associated with an SSID "WHU-STU". I should have looked more closely
as I missed that they are the same SSID with radically different
configurations. Both come from the same vendor but, with 13.1, both are setting
up in a broken manner. "media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode
11ng" is probably nonsensical. At least it is certainly wrong! DS is obsolete
and has not  ben use in year. 1Mbps does make some sense if your are using DS,
but, even then, it's weird.

I wish I could look at the ifconfig from when I was at the hotel, but I have
not recorded it anywhere.

The results of this WPA configured mode is very unlikely to work. I'm guessing
that the issue is that the APs at your location is using MCS. Bet the hotel is,
too. It's relatively new and I suspect the 13.1 wpa_supplicant is broken in how
it deals with it. My home router does not use it.

Only about a half dozen commits, from a quick look, to wpa_supplicant, so
bisecting should not take too long, especially since it is in user space. If I 
had access to an AP that used MCS for selection, I'd do it myself, but I don't.
If you have the interest and the time, it will be fairly simple. (One of the
big things you get with git). teh commits of interest are:
wpa: Import wpa 2.10.   Cy Schubert     2022-02-08      22      -1500/+98
wpa: Import wpa_supplicant/hostapd commit b26f5c0fe     Cy Schubert    
2022-02-08      27      -110/+824
wpa: Import wpa_supplicant/hostapd commit 14ab4a816     Cy Schubert    
2022-01-03      33      -203/+3129
wpa: Import wpa_supplicant/hostapd commits up to b4f7506ff      Cy Schubert    
2021-11-04      105     -2474/+19727
wpa: Add wpa_cli action file event      Cy Schubert     2021-08-20      1      
-0/+2

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