AW: [Telit LE910-EU1] mbimcli -disconnect error

[Matthias Mielke]

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.

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
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