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[Launchpad Bug Tracker <1418077@xxxxxxxxxxxxxxxxxx>]

** Branch linked: lp:~network-manager/network-manager/ubuntu

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https://bugs.launchpad.net/bugs/1418077

Title:
  After connection drops, mobile-data takes ~5m to re-connect

Status in the base for Ubuntu mobile products:
  In Progress
Status in network-manager package in Ubuntu:
  Fix Released

Bug description:
  If the mobile data connection drops due to signal loss or modem reset
  ( eg. changing radio technology, setting 3g slot, ... ), there's a
  delay of 5m before NetworkManager attempts to re-connect.

  The original bug pertained to changing the radio technology ( which
  causes the modem to unregister and then re-register using the new
  technology ), however the problem is more generic.  The steps to
  reproduce focus on this case, as this is the easiest way to get the
  modem to drop the connection for long enough for the problem to occur.

  Forcing the modem to disconnect via wrapping the device in tin-foil
  should also trigger the problem.

  Steps to reproduce:
  1. Confirm cellular data (disable wifi)
  2. Change TechnologyPreference on online SIM
  3. Confirm no cellular data
  4. Wait ~10 minutes
  5. Confirm cellular data

  What happens:
  Changing something on the modem causes cellular data to disappear for 10 minutes

  What should happen:
  It should behave as before, i.e. cellular data should come back immediately

  current build number: 97
  device name: krillin
  channel: ubuntu-touch/devel-proposed
  alias: ubuntu-touch/vivid-proposed
  last update: 2015-02-02 12:48:25
  version version: 97
  version ubuntu: 20150202
  version device: 20150128-5379bdb
  version custom: 20150202

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