[Telit LE910-EU1] mbimcli -disconnect error

[Daniele Palmas]

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