umodem0, Cisco USB serial console, and quirks

[Mike Andrews]

On 11/1/18 4:59 PM, Andrey V. Elsukov wrote:

> On 27.09.2017 05:11, Mike Andrews wrote:
>>> This is the USB read transfer. The other side is not returning any
>>> data, so neither is "cu" printing anything. Maybe you can try to get a
>>> similar trace from the system where it works?
>>>
>>> Looks to me like some kind of protocol error, that the Cisco USB
>>> serial console needs some kind of activation.
>> Took me a few days to get around to getting usbmon going on Linux.  The
>> verbose dump is too large for the list, so:
>>
>>     https://www.bit0.com/tmp/usbmon-ciscoasa-verbose.txt
>>     https://www.bit0.com/tmp/usbmon-ciscoasa.txt
> Hi,
>
> did you find some solution? It seems this device still doesn't work with
> recent FreeBSD.
> I found how it should work on linux:
> https://community.cisco.com/t5/network-architecture-documents/cisco-console-connection-via-usb-serial/ta-p/3163540
>
> And it seems in Linux it is handled by generic CDC ACM driver without
> any quirks. So, I think the problem is with our umodem(4) or ucom(4)
> driver.
>
No, I didn't.

The usbmon dumps above are still there, and if someone can suggest 
anything else I can do to help, lemme know.