netdev - Re: MBIM device refusing to be enabled

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Message-ID: <871u3u21zz.fsf@nemi.mork.no>
Date:	Wed, 09 Oct 2013 12:05:20 +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

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?


Bjørn
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