<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof">
<span class="x_elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);"><font face="Arial, Helvetica, sans-serif"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0 elementToProof">Hello
All,</span></font></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof">
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<font face="Arial, Helvetica, sans-serif"><span style="font-size:13.3333px;margin:0px" class="ContentPasted0"><br>
</span></font></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<font face="Arial, Helvetica, sans-serif"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0 ContentPasted2">We am seeing a strange issue where Modem instance reconnects automatically once </span></font></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<font face="Arial, Helvetica, sans-serif"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0 ContentPasted2">in a while, modem used in EM7455. T</span></font><font face="Arial, Helvetica, sans-serif" style="font-style: inherit; font-variant-ligatures: inherit; font-variant-caps: inherit; font-weight: inherit;"><span style="font-size: 9pt; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">his
happens after some time of succesful</span></font></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<font face="Arial, Helvetica, sans-serif" style="font-style: inherit; font-variant-ligatures: inherit; font-variant-caps: inherit; font-weight: inherit;"><span style="font-size: 9pt; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">data
connection and the once the issue occurs network is disrupted for </span></font><span style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">30-45 </span><span style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">seconds. </span></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">This is very random and some times</span><span style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;"> happens quite often
like every 1 hour or so.</span></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span class="ContentPasted0" style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">From the debug logs I can see </span><span class="ContentPasted0" style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">there
is USB disconnect and </span><span class="ContentPasted0" style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">qcdm reports "</span><span class="ContentPasted0" style="color: rgb(36, 36, 36); font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">unexpected
port hangup" .</span></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">I tried searching modemforums </span><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">and
issues in</span><span style="font-size:10pt;margin:0px" class="ContentPasted0"><span class="ContentPasted0" style="font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;"> </span></span><span style="font-size:13.3333px;margin:0px"><a href="https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/?search=forced%20to%20close%20port&sort=created_date&state=opened&first_page_size=20" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" title="https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/?search=forced%20to%20close%20port&sort=created_date&state=opened&first_page_size=20" data-loopstyle="link" data-safelink="true" data-linkindex="0" style="margin:0px" class="ContentPasted0"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">gitlab</span></a></span><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">,
but didn't find any one reporting this kind</span></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">of behavior for EM7455, it would be of great help if anyone can throw some light on this failure.</span></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<br>
</div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span style="font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">Logs:</span></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span class="x_elementToProof" style="margin:0px;background-color:rgb(255, 255, 255)"><span class="x_ContentPasted1 ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">From logs:</span></span></div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<div class="x_elementToProof" style="margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted1 x_ContentPasted4 ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.564 INFO kern kernel:[16332.259560] usb 1-1.3: USB disconnect, device number
5</span></div>
<div class="x_elementToProof" style="margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted1 x_ContentPasted4" style="font-size:13.3333px;margin:0px">
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.044 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB0/qcdm]
unexpected port hangup!</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.044 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB0/qcdm]
forced to close port</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.044 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB0/qcdm]
device open count is 0 (close)</span></div>
<div class="x_ContentPasted4 elementToProof" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.044 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB0/qcdm]
closing serial port </span></div>
<div class="x_ContentPasted4 elementToProof" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.044 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB0/qcdm]
serial port closed </span></div>
<div class="x_ContentPasted4 elementToProof" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.565 INFO kern kernel:[16332.261131] qcserial
ttyUSB0: Qualcomm USB modem converter now disconnected from ttyUSB0</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.566 INFO kern kernel:[16332.261629] qcserial 1-1.3:1.0: device
disconnected</span></div>
<div class="x_ContentPasted4 elementToProof" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.567 INFO kern kernel:[16332.262427] qcserial
ttyUSB1: Qualcomm USB modem converter now disconnected from ttyUSB1</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.567 INFO kern kernel:[16332.262472] qcserial 1-1.3:1.2: device
disconnected</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.047 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB2/at]
unexpected port hangup!</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.047 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB2/at]
forced to close port</span></div>
<div class="x_ContentPasted4 elementToProof" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.047 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB2/at]
device open count is 0 (close)</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.047 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB2/at]
closing serial port...</span></div>
<div class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.047 DEBUG daemon ModemManager[5106]: <debug> [modem0/ttyUSB2/at]
serial port closed</span></div>
<div class="x_ContentPasted4 elementToProof" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.569 INFO kern kernel:[16332.264374] qcserial
ttyUSB2: Qualcomm USB modem converter now disconnected from ttyUSB2 </span></div>
<div class="x_ContentPasted4 elementToProof" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.569 INFO kern kernel:[16332.264424] qcserial
1-1.3:1.3: device disconnected 2023-02-03T16:56:13.572 INFO kern kernel:[16332.267600] qmi_wwan 1-1.3:1.8 wwan0: unregister 'qmi_wwan' usb-0000:00:16.0-1.3, WWAN/QMI device</span></div>
</span></div>
<div class="x_elementToProof" style="margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted1 x_ContentPasted4" style="font-size:13.3333px;margin:0px"><span class="x_ContentPasted4" style="margin:0px"><span class="ContentPasted0 ContentPasted1" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">2023-02-03T16:56:13.053
NOTICE daemon netifd: Network device 'wwan0' link is down</span></span></span></div>
</div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<br class="Apple-interchange-newline ContentPasted1">
</div>
<div class="x_elementToProof elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<br>
</div>
<div class="x_elementToProof elementToProof" style="font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span style="font-size: 9pt; font-family: Calibri, Helvetica, sans-serif;">Versions used</span></div>
<div class="x_elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span class="x_ContentPasted1 ContentPasted0" style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;">libqmi: 1.28.6-1</span></div>
<div class="x_elementToProof" style="font-size: 15px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, "system-ui", Roboto, "Helvetica Neue", sans-serif; margin: 0px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">
<span class="x_ContentPasted1" style="font-size:13.3333px;margin:0px">
<div class="x_ContentPasted1 elementToProof" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">libmbim: 1.24.8-1</span></div>
<div class="x_ContentPasted1 elementToProof" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">modemmanager: 1.16.6.1</span></div>
<div class="x_ContentPasted1 elementToProof" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">openwrt: 19.07 based solution.</span></div>
<div style="margin:0px" class="elementToProof"><br class="x_ContentPasted1 ContentPasted0">
</div>
<div style="margin:0px" class="elementToProof"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">Carrier : Vodafone</span></div>
<div class="x_ContentPasted2 elementToProof" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">EM7455 firmware used: "SWI9X30C_02.24.03.00 r6978 CARMD-EV-FRMWR2 2017/03/02 13:36:45</span></div>
<div class="x_ContentPasted2 x_ContentPasted3" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0">response: '!IMPREF: ^M</span></div>
<div class="x_ContentPasted2 x_ContentPasted3" style="margin:0px">
<div class="x_ContentPasted3 elementToProof" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0"> preferred fw version: 02.24.03.00^M</span></div>
<div class="x_ContentPasted3" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0"> preferred carrier name: VODAFONE^M</span></div>
<div class="x_ContentPasted3" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0"> preferred config name: VODAFONE_001.001_000^M</span></div>
<div class="x_ContentPasted3" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0"> current fw version: 02.24.03.00^M</span></div>
<div class="x_ContentPasted3" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0"> current carrier name: VODAFONE^M</span></div>
<div class="x_ContentPasted3" style="margin:0px"><span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0"> current config name: VODAFONE_001.001_000'</span></div>
</div>
<div class="x_ContentPasted2 x_ContentPasted3 elementToProof" style="margin:0px">
<span style="font-size: 9pt; margin: 0px; font-family: Calibri, Helvetica, sans-serif;" class="ContentPasted0"> </span></div>
</span></div>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof">
<span style="font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">Thanks,</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof">
<span style="font-family: Calibri, Helvetica, sans-serif; font-size: 9pt;">Pradeep G</span></div>
</body>
</html>