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[Tony Espy <1418077@xxxxxxxxxxxxxxxxxx>]

So confirmed that adding a case for
NM_DEVICE_STATE_REASON_MODEM_NO_CARRIER in device_state_changed ( nm-
device-modem.c ), causes the connection to be blocked from auto-
connecting.

I still see the initial retries decrement log message in
device_state_changed ( nm-policy.c ), I mentioned this is due to the
transition of the device from 'Activated' to 'Failed', it's not a new
activation attempt.   When this is logged( w/retries=4 ), I don't see
any subsequent attempts to retry, ever.

nm-policy controls the clearing of the connection's
'autoconnect_blocked_reason' ( which is what gets used in this scenario
to block autoconnect ), and at the moment, nothing done by the NM ofono
code is triggering the right state changes to clear the reason when
'Attached' becomes TRUE again.   Nor is there a timer set, as is done
when an autoconnect sequence exceeds it's retry count ( ie. the ~5m
timer mentioned above ).

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

Title:
  After radio technology is changed, mobile-data takes ~5m to re-connect

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

Bug description:
  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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