<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Hi Aleksander, Carlo & Daniele,</span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>thanks for the fast reply!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Before the disconnection I get connected to the network using mbim-network /dev/cdc-wdm0 start.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>My kernel version is 3.18.0-linux4sam_5.0-alpha3<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Telit revision: LE910_EU1_1G-20.00.410.B101<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>I’m not available over the weekend, I will answer Monday again!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Matthias<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US>> I cannot find this thread in the mailinglist<o:p></o:p></span></p></div><p class=MsoNormal>nevermind, I was checking the modemmanager's one<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, 4 Aug 2017 at 15:43 Carlo Lobrano <<a href="mailto:c.lobrano@gmail.com">c.lobrano@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Hi Aleksander,<o:p></o:p></p></div><p class=MsoNormal>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. <o:p></o:p></p></div><p class=MsoNormal>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?)<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, 4 Aug 2017 at 15:30 Aleksander Morgado <<a href="mailto:aleksander@aleksander.es" target="_blank">aleksander@aleksander.es</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>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>><br>><br>><br>><br>><br>> 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" target="_blank">https://aleksander.es</a><o:p></o:p></p></blockquote></div></blockquote></div></div></body></html>