[regression] The USB WiFi card stopped working: if_run doesn't create the 'run0' interface any more

[Yuri Pankov]

Yuri wrote:
> On 07/03/18 12:45, Yuri wrote:
>> I updated the laptop to r335884 last night, and 'service
>> wpa_supplicant start wlan0' doesn't succeed any more.
>>
>> kernel is supposed to create the network interface 'run0', but it
>> doesn't. This is the immediate reason why wpa_supplicant fails.
>>
>> The non-creation of 'run0' is a regression. I don't know of any
>> workaround.
>>
>>
>> The steps 'mergemaster -p' and 'mergemaster' were done during the
>> upgrade, so /etc is updated.
> 
> 
> Bug report for this problem:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229738
> 
> This is a very serious regression breaking WiFi.

It's likely the switch from using usb.conf to devmatch.conf (see r329148).

I can confirm the problem, inserting the ralink usb wifi dongle doesn't 
do anything (I'm not using it anymore so I didn't notice the problem), 
though the action in devmatch.conf is executed, so it might be the 
problem somewhere below in devmatch(8).