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[Launchpad Bug Tracker <1440917@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package network-manager - 0.9.10.0-4ubuntu19

---------------
network-manager (0.9.10.0-4ubuntu19) wily; urgency=medium

  [ Tony Espy ]
  * debian/patches/add_ofono_settings_support.patch: remove code
    that added APN, USERNAME and PASSWORD to NM_SETTING_GSM object.
    NM doesn't actually need access to these settings, and USERNAME/
    PASSWORD can cause issues with NM's secrets needed logic.
  * debian/patches/0001-wwan-add-support-for-using-oFono-as-a-modem-manager.patch,
    debian/patches/lp1461593-add-nm-settings-connection-reset-retries-methods.patch,
    debian/patches/add_ofono_settings_support.patch,
    debian/patches/lp1461593-add-modem-reconnect-delay-to-policy.patch: More changes
    to NMModemOfono's modem_state handling.  Added get/set_reset_retries_timeout
    methods to NMSettingsConnection, and use the set method to lower the timeout for
    ofono connections to 30s.  Finally added a 5s delay to NM_POLICY's activation
    logic triggered when a modem device is disconnected.  This allows modem time to
    settle and NM to process the resulting DBus state changes. (LP: #1461593)
  * debian/patches/0001-wwan-add-support-for-using-oFono-as-a-modem-manager.patch,
    debian/patches/lp1445080-modify-device-modem-avail.patch,
    debian/patches/lp1445080-nm-modem-check-for-set-mm-enabled-func.patch,
    debian/patches/lp1461593-add-modem-reconnect-delay-to-policy.patch: These
    changes collectively fix flight-mode on arale ( and other devices ), due to
    some fundemental race conditions in the ofono logic. (LP: #1445080, #1440917)
  * debian/patches/0001-wwan-add-support-for-using-oFono-as-a-modem-manager.patch,
    debian/patches/add_ofono_settings_support.patch: Add support for the ofono
    gprs-context 'Preferred' property. (LP: #1361864)

  [ Mathieu Trudel-Lapierre ]
  * d/p/0002-wifi-cull-the-scan-list-before-signalling-ScanDone-b.patch:
    Re-add schedule_scan() call after we get the ScanDone signal from the
    supplicant. Otherwise we'd do one scan on startup and never scan again.
    (LP: #1445134)

 -- Mathieu Trudel-Lapierre <mathieu-tl@xxxxxxxxxx>  Wed, 05 Aug 2015
12:17:28 -0400

** Changed in: network-manager (Ubuntu)
       Status: In Progress => 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:
  Fix Released
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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