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[martinwguy <martinwguy@xxxxxxxxx>]

I was affected by and resolved this bug in my system.  The cause was
that I hadn't done the 15E-per-month top-up that the contract required.

The fix was to pay the 15E, then I had to delete the network connection
and recreate it before it went back to working.

The error message is confusing, yes.

I attach the syslog extract from an unsuccessful attempt yesterday to
connect exhibiting thid behaviour. In the next comment I will attach an
extract from a successful one today. Each extract runs from insertion of
the device to me prodding it to connect, to the session failure or
successful connection.

The Password window seems to be triggered by the provider failing the CHAP negotiation - see line 103 of the "unsuccessful" log.
However, it may not be possible to do anything different, other than simply drop the "password" window completely. Tha would fix this bug (simply failing the connection without giving a bogus reason why) but may cause breakage for people who don't want to store passwords and prefer to type them in every time.

** Attachment added: "syslog for unsuccessful connection triggering this bug"
   https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/518480/+attachment/2623022/+files/518480-unsuccessful.log

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https://bugs.launchpad.net/bugs/518480

Title:
  NM prompts for password, doesn't accept it - Huawei E172 3G

Status in NetworkManager:
  Invalid
Status in “network-manager” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: network-manager

  I use a Huawei E172 3G USB dongle for my mobile braoadband internet
  connection (on Vodafone).

  What happens:

  Approximately 40% of the times where I boot my machine and load my
  Desktop, Network Manager throws up a password box that says "A
  password is required to connect to "Vodafone Contract" HUAWEI
  Technologies HUAWEI Mobile" (see screenshot).  However, it does not
  accept my password.  There appears to be no pattern to this. This
  happens when no changes have been made to my system - no recently
  installed updates etc.  On one occasion it didn't happen for as long
  as five days, on another occasion it happened on four reboots in a row
  - it really does seem completely random.  The only option is to open
  network-manager-applet, delete my mobile broadband connection
  settings, then run the connection wizard again to re-apply them from
  the beginning

  What should happen:

  Network Manager should not prompt me for a password for my 3G dongle
  when I load my Desktop. I should not have to delete my 3G mobile
  broadband settings in network-manager-applet, and then go through the
  wizard again to re-apply the settings.

  Technical details:

  Distro Version - Ubuntu Karmic 9.10, 32-bit, default fresh install with latest updates
  Desktop Environment - GNOME 2.28.1 (Ubuntu 2009-11-03)
  Kernel - Linux 2.6.31-19-generic
  System - Athlon 64 3400 2.2GHz processor, NVidia 6800LE graphics, 1.5MB RAM
  Network Manager Applet Version - 0.7.996
  Modem - Huawei E172 USB stick on Vodafone with latest firmware

  ProblemType: Bug
  Architecture: i386
  Date: Sun Feb  7 18:07:50 2010
  DistroRelease: Ubuntu 9.10
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  NonfreeKernelModules: nvidia
  Package: network-manager 0.8~a~git.20091013t193206.679d548-0ubuntu1
  ProcEnviron:
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
  SourcePackage: network-manager
  Uname: Linux 2.6.31-19-generic i686

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