[Bug 263632] iwlwifi(4) crashes (freezes) a few seconds after resuming from sleep (suspend/resume not working; workaround known for now)

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 14 Apr 2024 20:52:21 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263632

--- Comment #41 from Jonathan Vasquez <jon@xyinn.org> ---
I tested the `ifconfig wlan0 down` and `ifconfig wlan0 up` approach but it
didn't work unfortunately, it just stayed like this:

wlan0: flags=8c43<UP,BROADCAST,RUNNING,DRV_OACTIVE,SIMPLEX,MULTICAST> metric 0
mtu 1500
        options=0
        ether c8:15:4e:aa:6d:92
        inet 192.168.1.102 netmask 0xffffff00 broadcast 192.168.1.255
        groups: wlan
        ssid "" channel 40 (5200 MHz 11a)
        regdomain FCC country US authmode WPA1+WPA2/802.11i privacy ON
        deftxkey UNDEF AES-CCM 2:128-bit txpower 17 bmiss 7 mcastrate 6
        mgmtrate 6 scanvalid 60 wme roaming MANUAL
        parent interface: iwlwifi0
        media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
        status: no carrier
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

However I was able to get more log output in dmesg after I did that. The output
is attached as 'dmesg-2024-04-14-1650.txt`. I tried the above up/down two times
but neither worked. If you look for "iwlwifi0: Error sending TXPATH_FLUSH: time
out after 2000ms.", you can see the segments when I did "down". The full
service restart fixed it again.

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