[Telit LE910-EU1] mbimcli -disconnect error

[Daniele Palmas]

Hi Matthias,

2017-08-09 10:06 GMT+02:00 Matthias Mielke <Mielke at efr.de>:
> Hi all,
>
> thanks for the input. I got in contact with Telit support and received the latest firmware for the LE910_EU1
> Now the modem is working without power-cycling itself.
> The problem is solved.
>

Great, thanks for the update.

Regards,
Daniele

> Best regards,
> Matthias
>
> -----Ursprüngliche Nachricht-----
> Von: Daniele Palmas [mailto:dnlplm at gmail.com]
> Gesendet: Montag, 7. August 2017 09:12
> An: Matthias Mielke <Mielke at efr.de>
> Cc: Carlo Lobrano <c.lobrano at gmail.com>; Aleksander Morgado <aleksander at aleksander.es>; libmbim-devel at lists.freedesktop.org
> Betreff: Re: [Telit LE910-EU1] mbimcli -disconnect error
>
> Hi Matthias,
>
> 2017-08-04 17:14 GMT+02:00 Matthias Mielke <Mielke at efr.de>:
>> Hi Aleksander, Carlo & Daniele,
>>
>>
>>
>> thanks for the fast reply!
>>
>>
>>
>> Before the disconnection I get connected to the network using
>> mbim-network
>> /dev/cdc-wdm0 start.
>>
>> My kernel version is 3.18.0-linux4sam_5.0-alpha3
>>
>> Telit revision: LE910_EU1_1G-20.00.410.B101
>>
>
> please contact Telit customer support and ask for latest firmware release, to see if the issue can be still reproduced, since your version is quite old.
>
> Regards,
> Daniele
>
>>
>>
>> I’m not available over the weekend, I will answer Monday again!
>>
>>
>>
>> Regards,
>>
>> Matthias
>>
>>
>>
>>> I cannot find this thread in the mailinglist
>>
>> nevermind, I was checking the modemmanager's one
>>
>>
>>
>> On Fri, 4 Aug 2017 at 15:43 Carlo Lobrano <c.lobrano at gmail.com> wrote:
>>
>> Hi Aleksander,
>>
>> I used LE910 in mbim mode for some time (even if not recently), but I
>> don't remember such problem, I need to check it again.
>>
>> I cannot find this thread in the mailinglist, so I don't have all the
>> info, what's the use case? What happens before the disconnection?
>> (kernel
>> version?)
>>
>>
>>
>> On Fri, 4 Aug 2017 at 15:30 Aleksander Morgado
>> <aleksander at aleksander.es>
>> wrote:
>>
>> Hey Matthias, Carlo & Daniele,
>>
>> On 04/08/17 13:40, Matthias Mielke wrote:
>>> usb 1-2: USB disconnect, device number 31 cdc_mbim 1-2:1.12:
>>> Unexpected error -71 cdc_mbim 1-2:1.12 wwan0: unregister 'cdc_mbim'
>>> usb-700000.ehci-2, CDC MBIM usb 1-2: new high-speed USB device number
>>> 32 using atmel-ehci usb 1-2: USB disconnect, device number 32 usb
>>> 1-2: new high-speed USB device number 33 using atmel-ehci cdc_mbim
>>> 1-2:1.12: setting rx_max = 16384 cdc_mbim 1-2:1.12: cdc-wdm0: USB WDM
>>> device cdc_mbim 1-2:1.12 wwan0: register 'cdc_mbim' at
>>> usb-700000.ehci-2, CDC MBIM,
>>> 72:a6:7a:22:88:b7
>>>
>>>
>>>
>>>
>>>
>>> The errors above seem to occur in around 50% of the cases I use the
>>> --disconnect  command, the other 50% are working fine and the modem
>>> gets disconnected from the network successfully.
>>>
>>>
>>>
>>> Still, after successful disconnect, the modem is also disconnecting
>>> from the USB.
>>> Can someone of you kind people assist me with my problem?
>>
>> I believe I'm going to blame this on buggy firmware. When you get the
>> "unexpected port hangup" it means the modem went away from the USB
>> subsystem, it power-cycles itself.
>>
>> Carlo, Daniele, have you seen any such thing with a Telit LE910 in
>> MBIM mode?
>>
>> --
>> Aleksander
>> https://aleksander.es