[Bug 1537576] Re: distro upgrade under crouton chroot session

[Brian Murray]

*** This bug is a duplicate of bug 1534374 ***
    https://bugs.launchpad.net/bugs/1534374

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1534374, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** This bug has been marked a duplicate of bug 1534374
   unable to upgrade to 15.04 due to libstdc++6 SRU

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https://bugs.launchpad.net/bugs/1537576

Title:
  distro upgrade under crouton chroot session

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Running Ubuntu 14.04 (Trusty) under crouton on a Chromebook
  Pixel(2015)

  Edited the file /etc/update-manager/release-upgrades

  replaced Prompt=lts by Prompt=normal

  sudo do-release-upgrade
  This was the output:

  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [198 B]                                                                                                 
  Get:2 Upgrade tool [1214 kB]                                                                                                         
  Fetched 1214 kB in 0s (0 B/s)                                                                                                        
  authenticate 'vivid.tar.gz' against 'vivid.tar.gz.gpg' 
  extracting 'vivid.tar.gz'
  ...
  ...
  ...
  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  Building data structures... Done 

  Calculating the changes

  Calculating the changes

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  This can be caused by: 
  * Upgrading to a pre-release version of Ubuntu 
  * Running the current pre-release version of Ubuntu 
  * Unofficial software packages not provided by Ubuntu 

  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. 

  
  Expected an upgrade to "Vivid",  changes were rolled back. Only packages not installed from repos are Google Chrome and Dropbox.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  Uname: Linux 3.14.0 x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sun Jan 24 19:15:03 2016
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-01-25 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-01-24T19:13:30.431739

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