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[Tony Espy <1440917@xxxxxxxxxxxxxxxxxx>]

This change was released to the vivid stable overlay PPA for touch as
version:

0.9.10.0-4ubuntu15.1.3

..as such marked as FixReleased for Ubuntu RTM task.

** Changed in: network-manager (Ubuntu RTM)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1440917

Title:
  ofono read_contexts code needs some re-work

Status in network-manager package in Ubuntu:
  In Progress
Status in network-manager package in Ubuntu RTM:
  Fix Released

Bug description:
  This bug is bring reported as of network-manager version
  0.9.10.0-4ubuntu13 ( latest in vivid at bug filing time ).

  The code in src/devices/wwan/nm-modem-ofono.c needs some optimization.

  Currently, the function ofono_read_contexts() is triggered when the
  modem becoming enabled, which happens when the three private boolean
  flags modem_online, gprs_powered, and gprs_attached are all TRUE, or
  when a new context is detected via a 'ContextAdded' signal sent by
  ofono's ConnectionManager interface.

  This function in turn, synchronously reads ( with a 2s timeout ) the
  ConnectionManager's 'SubscriberIdentity' property ( aka 'IMSI' ), and
  then calls the DBus method com.canonical.NMOfono.ReadImsiContexts,
  which triggers the ofono plugin to re-read the contexts directly from
  ofono's gprs settings file ( found in /var/lib/ofono/<IMSI>/ ).

  This could be optimized by instead having NM read the IMSI whenever
  the ConnectionManager's 'Powered' property is set, caching the value,
  and watching for changes to the 'SubscriberIdentity'.

  Also it's curious that the contexts aren't re-read when a
  'ContextRemoved' signal is received.

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