Bug 104557

Summary: No connection after OS upgrade
Product: ModemManager Reporter: Fabien Grumelard <fabix-freedesktop>
Component: generalAssignee: ModemManager bug user <modemmanager>
Status: RESOLVED NOTOURBUG QA Contact:
Severity: normal    
Priority: medium    
Version: 1.6   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments: debug logs of modemManager and NetworkManager

Description Fabien Grumelard 2018-01-09 13:54:13 UTC 
Created attachment 136631 [details]
debug logs of modemManager and NetworkManager

Hi,

I have a Option Globetrotter HSDPA Modem (ID 0af0:6971). 
On a Debian Stretch, there is no problem to establish a broadband connection. 
On a Debian Buster/Sid, that doesn't work anymore (configuration files are the same). I don't know if the problem comes from the kernel (4.14.0), ModemManager (1.6.8) or NetworkManager (1.10.2).
You can see debug logs in attachment.

Regards,
Fabien
Comment 1 Aleksander Morgado 2018-01-09 14:08:34 UTC 
I believe this is the culprit:

<info>  [1515504760.7109] modem-broadband[ttyHS0]: IPv4 static configuration:
<warn>  [1515504760.7111] device (ttyHS0): retrieving IPv4 configuration failed: (ttyHS0) retrieving IP4 configuration failed: invalid gateway address (null)

This is a bug in NM 1.10.2, and I believe it's fixed in the nm-1-10 branch here, but not released yet:
https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?h=nm-1-10&id=f4dc5bd782e709c541174aac3fd3a160ca5f53ba

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