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[Alberto Salvia Novella <es20490446e@xxxxxxxxx>]

** Changed in: network-manager (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1520887

Title:
  Workaround Ubuntu 15.10. Network manager applet cannot stably activate
  mobile broadband using 4G USB modem ZTE MF820D.

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  I use Ubuntu 15.10, I have done a fresh install formerly using 14.04
  on the same hardware setup.

  If I boot Ubuntu from power-off, then I must sometimes enter the PIN-
  code for the mobile broadband SIM-card, I also get prompted for my
  password (to make changes to the mobile broadband device); however,
  most of the time only my password is needed, and the saved PIN-code is
  used.

  After entering my password the 4G-USB-modem gets green light for
  establishing an 4G (or 3G) connection, but it is impossible to connect
  to the 4G-internet from the desktop drop down menu of network manager
  at this stage; I get an error message: "(Translated from Swedish-
  Activate connection failure) Creating object for path
  '/org/freedesktop/NetworkManager/ActiveConnection/1' failed in libnm-
  glib."

  (I have set up this 4G-internet-connention with help from the network-
  manager wizard, using defaults, except turning off roaming and setting
  "allow all users to connect.")

  However, if I choose to reboot without power-off, the green light on
  the USB-modem stays on during the reboot (keeps 4G-connected I
  presume), then it is possible to connect to internet from the drop
  down menu, most of the time. Some times I also had to deactivate-
  activate mobile broadband from the drop down menu before internet
  connection could be established.

  It is also not possible to edit the connections of the mobile broadband in the network manager applet; I get an error message: "(Translated from Swedish-Error initiating editor) settings/nm-settings-connection.c.955 - Connection didn't have requested setting 'ppp'".
  Editing the wifi-connection works just fine.

  Regards

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: network-manager 1.0.4-0ubuntu5.1
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Nov 29 07:44:12 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  IpRoute:
   default via 95.192.135.45 dev wwx0eb79c89dc58  proto static  metric 750
   95.192.135.44/30 dev wwx0eb79c89dc58  proto kernel  scope link  src 95.192.135.46  metric 750
   169.254.0.0/16 dev wwx0eb79c89dc58  scope link  metric 1000
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  ProcEnviron:
   LANGUAGE=sv
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=sv_SE.UTF-8
   SHELL=/bin/bash
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-dev:
   DEVICE    TYPE      STATE         DBUS-PATH                                  CONNECTION      CON-UUID                              CON-PATH
   cdc-wdm1  gsm       connected     /org/freedesktop/NetworkManager/Devices/3  Telia Telia 4G  d851a986-be40-488b-9f96-36d2c9387b57  /org/freedesktop/NetworkManager/ActiveConnection/5
   wlp3s0    wifi      disconnected  /org/freedesktop/NetworkManager/Devices/2  --              --                                    --
   enp4s0    ethernet  unavailable   /org/freedesktop/NetworkManager/Devices/1  --              --                                    --
   lo        loopback  unmanaged     /org/freedesktop/NetworkManager/Devices/0  --              --                                    --
  nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

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