[Bug 1758885] Re: Upgrade to 18.04 is failing from 17.10

[Reed Hedges]

Hello, I have a similar problem, would someone mind writing how to determine which package is causing the problem?  Did you use /var/log/dist-upgrade/apt.log to determine that it was libgbm1 for the original poster? If so what should I be looking for in there?  This is a top google search result, so adding that info here would probably help various people determine which 3rd party package is the problem.
Thanks

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https://bugs.launchpad.net/bugs/1758885

Title:
  Upgrade to 18.04 is failing from 17.10

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

Bug description:
  Getting the same issue with sudo update-manager -d

  At first I had the message that "Could not calculate the upgrade" with a list of the custom kernel I had installed (from PPA kernel repo).
  I uninstalled those and it was still failing.
  Uninstalling again, this time with "Mark for complete removal" checked. And the error is still there, however, there's no mention on where the failure is occurring, nor which package is causing the problem.

  At this stage, this is now a stock 17.10 install, with no custom PPA
  setup, nor any 3rd party packages (I removed them all)

  Still can't upgrade.

  log:

  $ do-release-upgrade -d
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [819 B]                                           
  Get:2 Upgrade tool [1 251 kB]                                                  
  Fetched 1 252 kB in 0s (0 B/s)                                                 
  authenticate 'bionic.tar.gz' against 'bionic.tar.gz.gpg' 
  extracting 'bionic.tar.gz'

  Reading cache

  Checking package manager
  Reading package lists... Done
  Building dependency tree        
  Reading state information... Done
  Hit http://fr.archive.ubuntu.com/ubuntu artful InRelease                       
  Hit http://fr.archive.ubuntu.com/ubuntu artful-updates InRelease               
  Hit http://fr.archive.ubuntu.com/ubuntu artful-backports InRelease             
  Get:1 http://security.ubuntu.com/ubuntu artful-security InRelease [78,6 kB]    
  Hit http://fr.archive.ubuntu.com/ubuntu artful-proposed InRelease              
  Fetched 78,6 kB in 0s (0 B/s)                                                  
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Updating repository information
  Hit http://fr.archive.ubuntu.com/ubuntu bionic InRelease                       
  Hit http://fr.archive.ubuntu.com/ubuntu bionic-updates InRelease               
  Hit http://fr.archive.ubuntu.com/ubuntu bionic-backports InRelease             
  Hit http://security.ubuntu.com/ubuntu bionic-security InRelease                
  Fetched 0 B in 0s (0 B/s)                                                      

  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... 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. 

  
  Restoring original system state

  Aborting
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: ubuntu-release-upgrader-core 1:17.10.10
  ProcVersionSignature: Ubuntu 4.13.0-38.43-generic 4.13.16
  Uname: Linux 4.13.0-38-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Mar 26 12:59:56 2018
  InstallationDate: Installed on 2018-02-08 (45 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to artful on 2018-03-26 (0 days ago)

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