[FS#587] no wwan with qmi based modem quectel ec20

[LEDE Bugs]

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

User who did this - Alexander Couzens (lynxis) 

Attached to Project - LEDE Project
Summary - no wwan with qmi based modem quectel ec20
Task Type - Bug Report
Category - Base system
Status - New
Assigned To - 
Operating System - All
Severity - Low
Priority - Medium
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details - uqmi hangs on certain commands resulting in a half-connected wwan connection.

device: apu1d
modem: quectel ec20 / qualcom based
affected versions: lede 17.01, trunk

good uqmi version: 2016-08-23-eb1dec7d0dc283a7f61aa574a443a0ab61f8793f
bad uqmi version: 2016-12-19-8ceeab69-1


 1553 root      3288 S    {qmi.sh} /bin/sh ./qmi.sh qmi setup lte {"ifname":"wwan0","proto":"qmi","apn":"internet","
 1620 root      9024 S    uqmi -s -d /dev/cdc-wdm0 --wda-set-data-format 802.3
 1817 root      3072 S    grep qmi



config interface 'lte'
	option ifname 'wwan0'
	option proto 'qmi'
	option apn 'internet'
	option device '/dev/cdc-wdm0'
	option dhcp '1'


More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=587