[FS#53] uqmi not working with newer Modems like Sierra Wireless EM7455 - Task opened

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - schoerg (schoerg) 

Attached to Project - LEDE Project
Summary - uqmi not working with newer Modems like Sierra Wireless EM7455
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - TP-Link TL-WR1043nd-v1, newest LEDE from git (2016-07-15)
Linux lede 4.4.15 #1 Fri Jul 15 19:46:02 UTC 2016 mips GNU/Linux

Sierra Wireless EM7455 in QMI-Mode.
Bus 001 Device 004: ID 1199:9071 Sierra Wireless, Inc.


uqmi is not able to communicate with this modem, when entering

root at lede:~# uqmi -d /dev/cdc-wdm0 --get-capabilities


It just remains in this state indefinitly, no response is getting back.

When aborting the command with Ctrl+C, this messages is printed:

root at lede:~# uqmi -d /dev/cdc-wdm0 --get-capabilities
^C"Failed to connect to service"





dmesg output when Modem is connected: [  319.523044] qcserial 1-1:1.0: Qualcomm USB modem converter detected
[  319.529870] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB0
[  319.554844] qcserial 1-1:1.2: Qualcomm USB modem converter detected
[  319.561611] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB1
[  319.583843] qcserial 1-1:1.3: Qualcomm USB modem converter detected
[  319.590664] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB2
[  319.614610] qmi_wwan 1-1:1.8: cdc-wdm0: USB WDM device
[  319.621172] qmi_wwan 1-1:1.8 wwan0: register 'qmi_wwan' at usb-ehci-platform-1, WWAN/QMI device, e2:7a:a6:3d:40:c5





More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=53