<div dir="ltr"><div>> I cannot find this thread in the mailinglist<br><br></div>nevermind, I was checking the modemmanager's one<br></div><br><div class="gmail_quote"><div dir="ltr">On Fri, 4 Aug 2017 at 15:43 Carlo Lobrano <<a href="mailto:c.lobrano@gmail.com">c.lobrano@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Hi Aleksander,<br><br></div>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. <br></div>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?)<br></div><br><div class="gmail_quote"><div dir="ltr">On Fri, 4 Aug 2017 at 15:30 Aleksander Morgado <<a href="mailto:aleksander@aleksander.es" target="_blank">aleksander@aleksander.es</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey Matthias, Carlo & Daniele,<br>
<br>
On 04/08/17 13:40, Matthias Mielke wrote:<br>
> usb 1-2: USB disconnect, device number 31<br>
> cdc_mbim 1-2:1.12: Unexpected error -71<br>
> cdc_mbim 1-2:1.12 wwan0: unregister 'cdc_mbim' usb-700000.ehci-2, CDC MBIM<br>
> usb 1-2: new high-speed USB device number 32 using atmel-ehci<br>
> usb 1-2: USB disconnect, device number 32<br>
> usb 1-2: new high-speed USB device number 33 using atmel-ehci<br>
> cdc_mbim 1-2:1.12: setting rx_max = 16384<br>
> cdc_mbim 1-2:1.12: cdc-wdm0: USB WDM device<br>
> cdc_mbim 1-2:1.12 wwan0: register 'cdc_mbim' at usb-700000.ehci-2, CDC MBIM,<br>
> 72:a6:7a:22:88:b7<br>
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> The errors above seem to occur in around 50% of the cases I use the<br>
> --disconnect command, the other 50% are working fine and the modem gets<br>
> disconnected from the network successfully.<br>
><br>
><br>
><br>
> Still, after successful disconnect, the modem is also disconnecting from the<br>
> USB.<br>
> Can someone of you kind people assist me with my problem?<br>
<br>
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.<br>
<br>
Carlo, Daniele, have you seen any such thing with a Telit LE910 in MBIM mode?<br>
<br>
--<br>
Aleksander<br>
<a href="https://aleksander.es" rel="noreferrer" target="_blank">https://aleksander.es</a><br>
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