I've seen some reports of these; but without logs this is the kind of
thing that is impossible to debug.
Could someone seeing this enable debug logs in NetworkManager (editing
/etc/init/network-manager.conf and adding --log-level=debug --log-
domains=core,mb to the Exec line) as well as enabling ofono debug logs
(same idea, add -d to the Exec line), and try to follow the states
reported from /usr/share/ofono/scripts/list-modems as the time passes,
since this seems to be roughly limited to about a 10 minutes window?
Logs would end up in /var/log/syslog; the full syslog is useful to debug
this behavior.
** Changed in: network-manager (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: network-manager (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1418077
Title:
NM fails to create a cellular data connection for a unacceptably long
time
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