Re: New laptop: AC 9461/9560: iwm or iwlwifi?

On Mon, 19 Dec 2022, Marco wrote:

> On Mon, Dec 19, 2022 at 10:07:50PM +0000, you (Bjoern A. Zeeb) sent the following to [freebsd-wireless] :
>> You could try a devctl reset ... between detach and set driver.
>>
>> Also you could try to stop the iwm0 (wlan0) before detaching and see if
>> that gets a clean(er) shutdown (service netif destroy wlan0 && devctl
>> detach ...)
>
> I rebooted with both wlans_ entries in rc.conf but not having any
> devmatch_blocklist active.
> wlan0 got autocreated with iwm0 as parent and is fuctioning.
> So at least having 2 wlans_ entries doesn't seem to hurt.
> Also if_iwlwifi.ko is listed in the kldstat output:
>
> # kldstat | grep -e wlan -e wi-fi -e wifi -e iwm
> 3    1 0xffffffff82141000     3130 wlan_xauth.ko
> 17    1 0xffffffff850c7000    880c8 if_iwlwifi.ko
> 18    1 0xffffffff85150000    17310 if_iwm.ko
> 21    1 0xffffffff85200000   28fee8 iwm9000fw.ko
>
> I stopped wlan0 and performed the devctl reset in between the detach and
> set driver steps but still wasn't successful:
>
> # service netif stop wlan0 && devctl detach pci0:0:20:3 && devctl reset pci0:0:20:3 && devctl set driver pci0:0:20:3 iwlwifi
>
> wlan0 got destroyed and the following was logged in /var/log/messages:
>
> Dec 19 22:31:42 harbinger wpa_supplicant[73966]: wlan0: CTRL-EVENT-DISCONNECTED bssid=72:a7:41:9b:4f:da reason=3 locally_generated=1
> Dec 19 22:31:42 harbinger wpa_supplicant[73966]: wlan0: CTRL-EVENT-DSCP-POLICY clear_all
> Dec 19 22:31:42 harbinger syslogd: last message repeated 1 times
> Dec 19 22:31:42 harbinger wpa_supplicant[73966]: wlan0: CTRL-EVENT-TERMINATING
> Dec 19 22:31:42 harbinger kernel: [680] wlan0: link state changed to DOWN
> Dec 19 22:31:42 harbinger rtsold[63523]: <rtsock_input_ifannounce> interface wlan0 removed
> Dec 19 22:31:42 harbinger kernel: [680] iwm0: detached
> Dec 19 22:31:42 harbinger kernel: [680] pci0:0:20:3: Transition from D0 to D3
> Dec 19 22:31:42 harbinger root[97472]: /etc/rc.d/netif: WARNING: wlan0 does not exist.  Skipped.
> Dec 19 22:31:42 harbinger kernel: [681] pci0:0:20:3: Transition from D0 to D3
> Dec 19 22:31:42 harbinger kernel: [681] iwlwifi0: <iwlwifi> mem 0xea238000-0xea23bfff irq 16 at device 20.3 on pci0
> Dec 19 22:31:42 harbinger kernel: [681] iwlwifi0: HW_REV=0xFFFFFFFF, PCI issues?
> Dec 19 22:31:42 harbinger kernel: [681] device_attach: iwlwifi0 attach returned 5
>
> Despite pci0:0:20:3 seeemingly "attached" to iwlwifi0 I can't seem to
> get wlan0 created using iwlwifi as parent.

So you by any chance have any power saving sysctl (or tunables) set?

I see two transiotions from D0 to D3 logged but nothing taking the
device out of D3 gets logged (could be an omission elsewhere).

Can you show a
 	pciconf -lBbcevV iwlwifi0
or
 	pciconf -lBbcevV pci0:0:20:3
(which ever one works in that state)?

/bz

-- 
Bjoern A. Zeeb                                                     r15:7