Re: kern/59922: iwm0 - Intel Dual Band Wireless AC 8265 (rev. 0x78) - stopped working on NetBSD 11.0_BETA

["requiem." <rqm%0xde501a7a.net@localhost>]

If it provides more context I had a similar issue on i386 with athn0 as well as rtwn0. Please see the message here:

https://marc.info/?l=netbsd-bugs&m=176817698721327&w=2

I haven't found a fix outside of downgrading to 10.1.

15 Jan 2026 10:10:22 Michael van Elst via gnats <gnats-admin%NetBSD.org@localhost>:

> The following reply was made to PR kern/59922; it has been noted by GNATS.
> 
> From: mlelstv%serpens.de@localhost (Michael van Elst)
> To: gnats-bugs%netbsd.org@localhost
> Cc:
> Subject: Re: kern/59922: iwm0 - Intel Dual Band Wireless AC 8265 (rev. 0x78) - stopped working on NetBSD 11.0_BETA
> Date: Thu, 15 Jan 2026 10:07:28 -0000 (UTC)
> 
> gnats-admin%NetBSD.org@localhost ("bartek.krawczyk%gmail.com@localhost via gnats") writes:
> 
>>[     4.271387] iwm0: hw rev 0x230, fw ver 22.361476.0, address 40:74:e0:51:38:58
>>[    19.361390] iwm0: autoconfiguration error: could not init bt coex (error 35)
> 
>>laptop# ifconfig iwm0
>>iwm0: flags=0x8803<UP,BROADCAST,SIMPLEX,MULTICAST> mtu 1500
>>        ssid "" nwkey 65536:"","","",""
>>        powersave off
>>        address: 40:74:e0:51:38:58
>>        media: IEEE802.11 autoselect
>>        status: no network
> 
> 
> There is hardly any difference between netbsd-10 and netbsd-11
> regarding the iwm driver and it is known to be pretty flaky.
> 
> One possible difference is the interaction with dhcpcd. It's
> possible that without dhcpcd the interface associates to the network,
> and when you start dhcpcd aftwards, that it appears to function.
> At least that's one of the failure modes I've seen.
> 
> In netbsd-current I have tried to fix iwm and it now seems to be
> stable for me and some others.
> 
> You could try to boot a current kernel from the daily build
> (you may need to also install the modules set from current).
> 
> Or if you are experienced, you could build a netbsd-11 kernel with
> the updated driver from netbsd-current.
> 
>