[Telit LE910-EU1] mbimcli -disconnect error

[Carlo Lobrano]

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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