[Telit LE910-EU1] mbimcli -disconnect error

[Aleksander Morgado]

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