OpenWrt/LEDE Project

  • Status Closed
  • Percent Complete
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Medium
  • Reported Version All
  • Due in Version Undecided
  • Due Date Undecided
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Attached to Project: OpenWrt/LEDE Project
Opened by Alexander Couzens - 03.03.2017
Last edited by Koen Vandeputte - 14.12.2018

FS#587 - no wwan with qmi based modem quectel ec20

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    {} /bin/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'
Closed by  Koen Vandeputte
14.12.2018 13:28
Reason for closing:  Different project
Additional comments about closing:  

upstream issue

JochenFriedrich commented on 23.03.2017 20:19

To me this looks more like a kernel bug. Both uqmi versions work ok with 4.4 and fail with 4.9.

This seems to be the bug:


Bjørn Mork commented on 22.04.2017 16:50

FYI: I just sent a revert for the suspected commit, with CC to stable:


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