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[Doome <1326954@xxxxxxxxxxxxxxxxxx>]

With the aforementioned udev rules file, the situation got much better.
However, it is not perfect. In some occasions (about 20~30% of resumes),
the modem is still unusable, and when this happens, only a reboot can
help to get it usable again.

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https://bugs.launchpad.net/bugs/1326954

Title:
  Sierra Wireless EM7305 (Fujitsu Lifebook S904) does not work after
  suspend/hibernate

Status in ModemManager:
  Confirmed
Status in libmbim package in Ubuntu:
  Confirmed
Status in modemmanager package in Ubuntu:
  Invalid

Bug description:
  Ubuntu 14.04, x86_64, ModemManager-1.0.0-2ubuntu1

  Card: Sierra Wireless EM7305 (PCI Express M.2 form factor)

  Expected: Sierra plugin is used
  Happens: Generic plugin is used instead

  After cold start the card seems to work almost fine, but does not come
  back after suspend or hibernate. At least after hibernate MM may go
  into a tight loop consuming 100% CPU.

  MM debug log output (full log attached):

  <debug> [1401992536.121631] [mm-plugin-manager.c:576] build_plugins_list(): (Plugin Manager) [wwan0] Found '1' plugins to try...
  <debug> [1401992536.125236] [mm-plugin-manager.c:580] build_plugins_list(): (Plugin Manager) [wwan0]   Will try with plugin 'Generic'
  <debug> [1401992536.128923] [mm-plugin.c:700] mm_plugin_supports_port(): (Generic) [wwan0] probing deferred until result suggested
  <debug> [1401992536.132687] [mm-plugin-manager.c:505] plugin_supports_port_ready(): (Plugin Manager) [wwan0] deferring support check until result suggested
  <debug> [1401992536.142664] [mm-port-probe.c:536] wdm_probe_mbim(): (usbmisc/cdc-wdm0) probing MBIM...
  <debug> [1401992538.202591] [mm-plugin-manager.c:646] min_probing_timeout_cb(): (Plugin Manager) [/sys/devices/pci0000:00/0000:00:14.0/usb1/1-6] Minimum probing time consumed
  [/dev/cdc-wdm0] Queried max control message size: 4096[/dev/cdc-wdm0] Sent message...
  <<<<<< RAW:
  <<<<<<   length = 16
  <<<<<<   data   = 01:00:00:00:10:00:00:00:01:00:00:00:00:10:00:00
  [/dev/cdc-wdm0] Sent message (translated)...
  <<<<<< Header:
  <<<<<<   length      = 16
  <<<<<<   type        = open (0x00000001)
  <<<<<<   transaction = 1
  <<<<<< Contents:
  <<<<<<   max_control_transfer = 4096
  [/dev/cdc-wdm0] Received message...
  >>>>>> RAW:
  >>>>>>   length = 16
  >>>>>>   data   = 01:00:00:80:10:00:00:00:01:00:00:00:00:00:00:00
  <debug> [1401992539.481429] [mm-port-probe.c:300] mm_port_probe_set_result_mbim(): (usbmisc/cdc-wdm0) port is MBIM-capable
  [/dev/cdc-wdm0] Sent message...
  <<<<<< RAW:
  <<<<<<   length = 12
  <<<<<<   data   = 02:00:00:00:0C:00:00:00:02:00:00:00
  [/dev/cdc-wdm0] Sent message (translated)...
  <<<<<< Header:
  <<<<<<   length      = 12
  <<<<<<   type        = close (0x00000002)
  <<<<<<   transaction = 2
  [/dev/cdc-wdm0] Received message...
  >>>>>> RAW:
  >>>>>>   length = 16
  >>>>>>   data   = 02:00:00:80:10:00:00:00:02:00:00:00:00:00:00:00
  <debug> [1401992539.545529] [mm-plugin-manager.c:417] plugin_supports_port_ready(): (Plugin Manager) (Generic) [cdc-wdm0] found best plugin for port
  <debug> [1401992539.549361] [mm-plugin-manager.c:334] suggest_port_probe_result(): (Plugin Manager) (Generic) [wwan0] deferred task completed, got suggested plugin
  <debug> [1401992539.553247] [mm-plugin-manager.c:274] port_probe_context_finished(): (Plugin Manager) 'cdc-wdm0' port probe finished, still 1 running probes in this device (wwan0)
  <debug> [1401992539.556995] [mm-plugin.c:700] mm_plugin_supports_port(): (Generic) [wwan0] probing deferred until result suggested
  <debug> [1401992539.560690] [mm-plugin-manager.c:485] plugin_supports_port_ready(): (Plugin Manager) (Generic) [wwan0] task completed, got suggested plugin
  <debug> [1401992539.564175] [mm-plugin-manager.c:285] port_probe_context_finished(): (Plugin Manager) 'wwan0' port probe finished, last one in device
  <debug> [1401992539.567868] [mm-plugin-manager.c:107] find_device_support_context_complete_and_free(): (Plugin Manager) [/sys/devices/pci0000:00/0000:00:14.0/usb1/1-6] device support check finished in '3.677528' seconds
  <info>  [1401992539.571611] [mm-device.c:486] mm_device_create_modem(): Creating modem with plugin 'Generic' and '2' ports
  <debug> [1401992539.575477] [generic/mm-plugin-generic.c:73] create_modem(): MBIM-powered generic modem found...

  mmcli output:

  /org/freedesktop/ModemManager1/Modem/0 (device id 'b3a77501ed8da196baa804a4142ff280766f6f98')
    -------------------------
    Hardware |   manufacturer: 'Generic'
             |          model: 'MBIM [1199:9063]'
             |       revision: 'SWI9X15C_01.12'
             |      supported: 'gsm-umts, lte'
             |        current: 'gsm-umts, lte'
             |   equipment id: '356906050069168'
    -------------------------
    System   |         device: '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-6'
             |        drivers: 'cdc_mbim'
             |         plugin: 'Generic'
             |   primary port: 'cdc-wdm0'
             |          ports: 'cdc-wdm0 (mbim), wwan0 (net)'
    -------------------------
    Numbers  |           own : 'unknown'
    -------------------------
    Status   |           lock: 'none'
             | unlock retries: 'sim-pin2 (3)'
             |          state: 'disabled'
             |    power state: 'on'
             |    access tech: 'unknown'
             | signal quality: '0' (cached)
    -------------------------
    Modes    |      supported: 'allowed: 2g, 3g, 4g; preferred: none'
             |        current: 'allowed: 2g, 3g, 4g; preferred: none'
    -------------------------
    Bands    |      supported: 'unknown'
             |        current: 'unknown'
    -------------------------
    IP       |      supported: 'ipv4, ipv6, ipv4v6'
    -------------------------
    3GPP     |           imei: '356906050069168'
             |  enabled locks: 'sim, fixed-dialing'
             |    operator id: 'unknown'
             |  operator name: 'unknown'
             |   registration: 'unknown'
    -------------------------
    SIM      |           path: '/org/freedesktop/ModemManager1/SIM/0'

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