<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi Guys,</div><div><br></div><div>I encounter a strange issue. at the beginning, the modem can normally registered and get IP successfully. but after several seconds, the network will automatically disconnect. this issue is random case. but I have observed this issue many times.</div><div><br></div><div>I have tested two libqmi version : 1.10.2 and 1.18.0, the issue still exist. when network disconnect. I checked the modem status as below. my kernel version is 4.4.0.</div><div><br></div><div>Is there someone also encounter this issue and how to fix it?</div><div><br></div><div><div># ./com_at /dev/ttyUSB6 'AT!GSTATUS?'</div><div>AT!GSTATUS?</div><div>!GSTATUS: </div><div>Current Time: 227<span class="Apple-tab-span" style="white-space:pre"> </span>Temperature: 34</div><div>Reset Counter: 9<span class="Apple-tab-span" style="white-space:pre"> </span>Mode: ONLINE </div><div>System mode: LTE <span class="Apple-tab-span" style="white-space:pre"> </span>PS state: Attached </div><div>LTE band: B3 <span class="Apple-tab-span" style="white-space:pre"> </span>LTE bw: 15 MHz </div><div>LTE Rx chan: 1825<span class="Apple-tab-span" style="white-space:pre"> </span>LTE Tx chan: 19825</div><div>LTE CA state: NOT ASSIGNED</div><div>EMM state: Registered <span class="Apple-tab-span" style="white-space:pre"> </span>Normal Service </div><div>RRC state: RRC Idle </div><div>IMS reg state: No Srv <span class="Apple-tab-span" style="white-space:pre"> </span></div><div><br></div><div>PCC RxM RSSI: -55<span class="Apple-tab-span" style="white-space:pre"> </span>RSRP (dBm): -84</div><div>PCC RxD RSSI: -95<span class="Apple-tab-span" style="white-space:pre"> </span>RSRP (dBm): -134</div><div>Tx Power: 0<span class="Apple-tab-span" style="white-space:pre"> </span>TAC: 5A17 (23063)</div><div>RSRQ (dB): -10.4<span class="Apple-tab-span" style="white-space:pre"> </span>Cell ID: 05A32F35 (94580533)</div><div>SINR (dB): 3.0</div><div>OK</div></div><div><br></div><div><div># qmi-network /dev/cdc-wdm5 status</div><div>Profile at '/etc/qmi-network.conf' not found...</div><div>Getting status with 'qmicli -d /dev/cdc-wdm5 --wds-get-packet-service-status '...</div><div>[22 Jun 2017, 03:10:00] -Warning ** [/dev/cdc-wdm5] requested auto mode but no MBIM QMUX support available</div><div>Status: disconnected</div></div><div><br></div><div>sometimes the qmi-network check network status as below:</div><div><br></div><div><div># qmi-network /dev/cdc-wdm3 status </div><div>Profile at '/etc/qmi-network.conf' not found...</div><div>Getting status with 'qmicli -d /dev/cdc-wdm3 --wds-get-packet-service-status '...</div><div>[22 Jun 2017, 03:11:01] -Warning ** [/dev/cdc-wdm3] requested auto mode but no MBIM QMUX support available</div><div>error: couldn't create client for the 'wds' service: CID allocation failed in the CTL client: Service mismatch (requested 'wds', got 'dms')</div><div>error: couldn't get packet service status</div><div><br></div><div># qmicli -d /dev/cdc-wdm3 --wds-get-packet-service-status</div><div>[22 Jun 2017, 03:11:11] -Warning ** [/dev/cdc-wdm3] requested auto mode but no MBIM QMUX support available</div><div>error: couldn't create client for the 'wds' service: CID allocation failed in the CTL client: Service mismatch (requested 'wds', got 'dms')</div><div>[/opt/tvu/TVUTransporter root@tvupack]</div><div>[root@tvupack]# qmicli -d /dev/cdc-wdm3 --wds-get-packet-service-status -v</div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] Opening device with flags 'auto'...</div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] loaded driver of cdc-wdm port: qmi_wwan</div><div>[22 Jun 2017, 03:11:14] -Warning ** [/dev/cdc-wdm3] requested auto mode but no MBIM QMUX support available</div><div>[22 Jun 2017, 03:11:14] [Debug] QMI Device at '/dev/cdc-wdm3' ready</div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] Assuming service 'wds' is supported...</div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] Allocating new client ID...</div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] sent message...</div><div><<<<<< RAW:</div><div><<<<<< length = 16</div><div><<<<<< data = 01:0F:00:00:00:00:00:01:22:00:04:00:01:01:00:01</div><div><br></div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] sent generic request (translated)...</div><div><<<<<< QMUX:</div><div><<<<<< length = 15</div><div><<<<<< flags = 0x00</div><div><<<<<< service = "ctl"</div><div><<<<<< client = 0</div><div><<<<<< QMI:</div><div><<<<<< flags = "none"</div><div><<<<<< transaction = 1</div><div><<<<<< tlv_length = 4</div><div><<<<<< message = "Allocate CID" (0x0022)</div><div><<<<<< TLV:</div><div><<<<<< type = "Service" (0x01)</div><div><<<<<< length = 1</div><div><<<<<< value = 01</div><div><<<<<< translated = wds</div><div><br></div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] received message...</div><div><<<<<< RAW:</div><div><<<<<< length = 24</div><div><<<<<< data = 01:17:00:80:00:00:01:01:22:00:0C:00:02:04:00:00:00:00:00:01:02:00:02:12</div><div><br></div><div>[22 Jun 2017, 03:11:14] [Debug] [/dev/cdc-wdm3] received generic response (translated)...</div><div><<<<<< QMUX:</div><div><<<<<< length = 23</div><div><<<<<< flags = 0x80</div><div><<<<<< service = "ctl"</div><div><<<<<< client = 0</div><div><<<<<< QMI:</div><div><<<<<< flags = "response"</div><div><<<<<< transaction = 1</div><div><<<<<< tlv_length = 12</div><div><<<<<< message = "Allocate CID" (0x0022)</div><div><<<<<< TLV:</div><div><<<<<< type = "Result" (0x02)</div><div><<<<<< length = 4</div><div><<<<<< value = 00:00:00:00</div><div><<<<<< translated = SUCCESS</div><div><<<<<< TLV:</div><div><<<<<< type = "Allocation Info" (0x01)</div><div><<<<<< length = 2</div><div><<<<<< value = 02:12</div><div><<<<<< translated = [ service = 'dms' cid = '18' ]</div><div><br></div><div>error: couldn't create client for the 'wds' service: CID allocation failed in the CTL client: Service mismatch (requested 'wds', got 'dms')</div></div><br><br><br><br><div style="position:relative;zoom:1">--<br><div>
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<div align="left"><strong><font color="#0000ff"><em>Best Regards,</em></font></strong></div>
<div><strong><font color="#0000ff"><em>Dai,Lijin</em></font></strong></div></div></div><div style="clear:both"></div></div></div><br><br><span title="neteasefooter"><p> </p></span>