Re: kern/57992: urtwn (and athn) driver lost network when WIFI router changes channel

[mlelstv%serpens.de@localhost (Michael van Elst)]

The following reply was made to PR kern/57992; it has been noted by GNATS.

From: mlelstv%serpens.de@localhost (Michael van Elst)
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/57992: urtwn (and athn) driver lost network when WIFI router changes channel
Date: Sun, 3 Mar 2024 13:29:58 -0000 (UTC)

 ea1abz%gmail.com@localhost writes:
 
 >If I force a channel change in the router, the network is lost and I cannot recover it. "service wpa_supplicant restart" does not recover network. "ifconfig urtwn0 down" and up does not fix it.
 
 While I can confirm that a channel change isn't recognized with urtwn(4),
 a restart of wpa_supplicant (or just a "scan" request from wpa_cli)
 causes a new scan and association with the network.
 
 An attempt to enable automatic scanning using the roaming options
 (e.g. bgscan) in wpa_supplicant.conf didn't help.
 
 N.B. The same experiment with iwm(4) causes a disconnect as soon as the
 access point switches channels and an immediate scan, but afterwards
 the scan results are always truncated and the network is never found.
 Only a reboot recovers iwm(4) from this state.