[Bug 1260855] [NEW] Shows no internet connectivity on IPv6 only network

[Kevin Otte]

Public bug reported:

When installing on an IPv6 only network, the installer incorrectly
reports that no Internet connectivity is available.

Steps to reproduce:
- Download desktop ISO. I used http://cdimage.ubuntu.com/xubuntu/daily-live/current/trusty-desktop-amd64.iso current at Fri Dec 13 15:00 EST
- Boot ISO on a computer where only IPv6 connectivity is available
- Choose Install Xubuntu
- Choose language

Results:
- At "Preparing to install Xubuntu screen" it states
  For best results, please ensure that this computer:
  ✓ has at least 5.5GB available drive space
  ✕ is connected to the Internet

Expected results:
- A checkmark next to "is connected to the internet"

The install is able to complete from the ISO. Once the installed machine
is booted, updates are able to be applied indicating Internet
connectivity is indeed available.

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "syslog while the "Preparing to install Xubuntu" dialog is still being displayed"
   https://bugs.launchpad.net/bugs/1260855/+attachment/3928895/+files/syslog

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https://bugs.launchpad.net/bugs/1260855

Title:
  Shows no internet connectivity on IPv6 only network

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  When installing on an IPv6 only network, the installer incorrectly
  reports that no Internet connectivity is available.

  Steps to reproduce:
  - Download desktop ISO. I used http://cdimage.ubuntu.com/xubuntu/daily-live/current/trusty-desktop-amd64.iso current at Fri Dec 13 15:00 EST
  - Boot ISO on a computer where only IPv6 connectivity is available
  - Choose Install Xubuntu
  - Choose language

  Results:
  - At "Preparing to install Xubuntu screen" it states
    For best results, please ensure that this computer:
    ✓ has at least 5.5GB available drive space
    ✕ is connected to the Internet

  Expected results:
  - A checkmark next to "is connected to the internet"

  The install is able to complete from the ISO. Once the installed
  machine is booted, updates are able to be applied indicating Internet
  connectivity is indeed available.

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