kern/59714: Struggling with iwm on Intel Wireless 8265 / 8275: could not load firmware + carrier lost

[marc@coquand.email]

>Number:         59714
>Category:       kern
>Synopsis:       Struggling with iwm on Intel Wireless 8265 / 8275: could not load firmware + carrier lost
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 19 20:20:00 +0000 2025
>Originator:     Marc
>Release:        10.1
>Organization:
>Environment:
NetBSD 10.1 Generic
>Description:
On my Thinkpad T480S (Intel Wireless 8265 / 8275), I'm having issues connecting to wifi.

I'm able to view available networks by running `ifconfig iwm0`, but I can not seem to connect to wifi.

I've set the connection with

ifconfig iwm0 up
ifconfig iwm0 ssid "My Wifi" nwkey "mypassword"

and made sure the ssid/nwkey are correct, works on other devices. 

I then try to connect with dhcpcd:

$ dhcpcd -M iwm0
iwm0: dhcpcd-9.4.1 starting
iwm0: DUID ...
iwm0: waiting for carrier
iwm0: carrier acquired
iwm0: IAID ...
iwm0: soliciting an IPv6 router
iwm0: soliciting a DHCP lease
iwm0: carrier lost - roaming
iwm0: probing for an IPv4LL address
iwm0: using IPv4LL address 169.XXX.XX.XXX
iwm0: carrier acquired
iwm0: IAID XX:XX:XX:XX
iwm0: soliciting an IPv6 router
iwm0: soliciting a DHCP lease
iwm0: carrier lost - roaming

From dmesg I'm noticing this error

iwm0: autoconfiguration error: could not load firmware (error 35, ok 1)
iwm0: autoconfiguration error: cpu1 status: 0x3030001
iwm0: autoconfiguration error: cpu2 status: 0x0
iwm0: autoconfiguration error: could not load firmware (error 35)
iwm0: autoconfiguration error: could not load firmware (error 35, ok 1)
iwm0: autoconfiguration error: cpu1 status: 0xa5a5a5a0
iwm0: autoconfiguration error: cpu2 status: 0xa5a5a5a0

It has worked in the past, so not sure what's wrong here.

>How-To-Repeat:

>Fix: