netdev - Re: MBIM device refusing to be enabled

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Message-ID: <87hacqzqi0.fsf@nemi.mork.no>
Date:	Wed, 09 Oct 2013 12:29:43 +0200
From:	Bjørn Mork <bjorn@...k.no>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Dan Williams <dcbw@...hat.com>, netdev@...r.kernel.org
Subject: Re: MBIM device refusing to be enabled

Bjørn Mork <bjorn@...k.no> writes:

> Oliver Neukum <oliver@...kum.org> writes:
>
>> I have a device which the kernel and MM (1.0) identify as MBIM.
>> I can transfer the PIN, but the device refuses to be enabled.
>> Any idea?
>
> [..]
>
>> 2013-10-09T10:49:49.930237+02:00 linux-3m4i ModemManager[566]:
>> [/dev/cdc-wdm0] Received message...#012>>>>>> RAW:#012>>>>>>   length =
>> 56#012>>>>>>   data   =
>> 03:00:00:80:38:00:00:00:13:00:00:00:01:00:00:00:00:00:00:00:A2:89:CC:33:BC:BB:8B:4F:B6:B0:13:3E:C2:AA:E6:DF:03:00:00:00:00:00:00:00:08:00:00:00:01:00:00:00:00:00:00:00
>> 2013-10-09T10:49:49.930545+02:00 linux-3m4i ModemManager[566]:
>> [/dev/cdc-wdm0] Received message (translated)...#012>>>>>>
>> Header:#012>>>>>>   length      = 56#012>>>>>>   type        =
>> command-done (0x80000003)#012>>>>>>   transaction = 19#012>>>>>>
>> Fragment header:#012>>>>>>   total   = 1#012>>>>>>   current =
>> 0#012>>>>>> Contents:#012>>>>>>   status error =
>> 'None' (0x00000000)#012>>>>>>   service      =
>> 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df)#012>>>>>>   cid
>> = 'radio-state' (0x00000003)
>
> It's a bit difficult to read these logs, but decoding the raw data
> results in:
>
> MBIM_MESSAGE_HEADER
>   MessageType:  0x80000003 (MBIM_COMMAND_DONE)
>   MessageLength:        56
>   TransactionId:        19
> MBIM_FRAGMENT_HEADER
>   TotalFragments:       0x00000001
>   CurrentFragment:      0x00000000
> BASIC_CONNECT (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df)
> MBIM_CID_RADIO_STATE (3)
> MBIM_STATUS_SUCCESS (0)
> InformationBuffer [8]:
>   HwRadioState: on
>   SwRadioState: off
>
> Which either means that the radio is disabled using rfkill, or that
> there is a problem with the platform rfkill driver for your laptop.
> In any case, this is the reason you cannot enable the modem.
>
> Does "rfkill list" confirm that the radio is disabled?  Can you change
> it?

Sorry, that was nonsense.  rfkill would only affect the HwRadioState.

Looking at the commands following this message, it appears that MM
correctly attempts to enable the SwRadioState but fails.  I don't know
why.


Bjørn
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