Unable to start mbim-network

[Michael Treitel]

Hello,

I am working with a Sierra Wireless 7511 with an AT&T (APN=BROADBAND) 
running on Cent OS 7.

I cannot get the command

     mbim-network start

to start




[root at localhost ~]# cat /etc/mbi-network.conf
APN=AT&T
PROXY=yes


[root at localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-957.27.2.el7.x86_64 #1 SMP Mon Jul 29 
17:46:05 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root at localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root at localhost ~]# lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
     |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/7p, 480M
     |__ Port 5: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M
         |__ Port 2: Dev 4, If 0, Class=Communications, Driver=cdc_mbim, 
480M
         |__ Port 2: Dev 4, If 1, Class=CDC Data, Driver=cdc_mbim, 480M
         |__ Port 2: Dev 4, If 2, Class=Vendor Specific Class, 
Driver=qcserial, 480M
         |__ Port 2: Dev 4, If 4, Class=Vendor Specific Class, Driver=, 480M
         |__ Port 3: Dev 5, If 0, Class=Human Interface Device, 
Driver=usbhid, 1.5M
[root at localhost ~]# dmesg | grep -ie sierra
[    2.281951] usb 1-5.2: Product: Sierra Wireless EM7511 Qualcomm® 
Snapdragon™ X16 LTE-A
[    2.281956] usb 1-5.2: Manufacturer: Sierra Wireless, Incorporated
[root at localhost ~]#


Here is the output


[root at localhost ~]# mbim-network /dev/cdc-wdm0 start
Profile at '/etc/mbim-network.conf' not found...
Loading previous state from /tmp/mbim-network-state-cdc-wdm0...
     Previous Transaction ID: 7
error: no actions specified
Clearing state at /tmp/mbim-network-state-cdc-wdm0...
Querying subscriber ready status 'mbimcli -d /dev/cdc-wdm0 
--query-subscriber-ready-status --no-close '...
[/dev/cdc-wdm0] Subscriber ready status retrieved: Ready state: 
'initialized' Subscriber ID: '310410786050384' SIM ICCID: 
'89014103277860503841' Ready info: 'none' Telephone numbers: (1) 
'15635492225' [/dev/cdc-wdm0] Session not closed: TRID: '4'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 4)
Querying registration state 'mbimcli -d /dev/cdc-wdm0 
--query-registration-state --no-open=4 --no-close '...
[/dev/cdc-wdm0] Registration status: Network error: 'unknown' Register 
state: 'deregistered' Register mode: 'automatic' Available data classes: 
'unknown' Current cellular class: 'gsm' Provider ID: 'unknown' Provider 
name: 'unknown' Roaming text: 'unknown' Registration flags: 
'manual-selection-not-available, packet-service-automatic-attach' 
[/dev/cdc-wdm0] Session not closed: TRID: '5'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 5)
Attaching to packet service with 'mbimcli -d /dev/cdc-wdm0 
--attach-packet-service --no-open=5 --no-close '...
error: operation failed: RadioPowerOff
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 6)
Starting network with 'mbimcli -d /dev/cdc-wdm0 --connect=apn='' 
--no-open=6 --no-close '...
error: operation failed: RadioPowerOff
Network start failed
[/dev/cdc-wdm0] Session not closed: TRID: '7'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 7)


I don't understand why the profile is not found nor why the error : 
operation fialed: RadioPowerOff

Your insight would be greatly appreciated.

Thanks


Michael



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