[Bug 1799855] Re: distribution upgrade bug - upgrading to 18.10

[Chris Guiver]

lubuntu 18.04.2 qa-test install: virtual machine on sony vaio ultrabook
(i5-9400u, 4gb, intel haswell-ULT); host is lubuntu 19.04

I didn't use `vim` to change sources, but found I could achieve equivalent with synaptic [package manager] which was pre-installed on Lubuntu 18.04; settings->repositories  and selecting using drop down australia->ftp.iinet.net.au.  i made no other changes
(note: mine wasn't identical, I don't recall adding -backports & had 'main universe multiverse restricted' for bionic, -updates, -security)

i `sudo vi /etc/update-manager/release-upgrades` ("=normal"); `sudo apt
update` (probably pointless but ..)

`do-release-upgrade -p`

..
6 installed packages are no longer supported by Canonical.  You can ..
..
on questions I used default (eg. lightdm as it was highlighted, not sddm or what I assume most users would do), package-maintainers-version, (y) remove obselete packages (probabe some users are likely to choose no for this), reboot (y)

login  (after reboot), brief explore & it's LXQt desktop, reboot(vm) &
again login and [still] looks correct

            .-/+oossssoo+/-.               guiverc at lubu-sru-test 
        `:+ssssssssssssssssss+:`           ---------------------                                                                                              
      -+ssssssssssssssssssyyssss+-         OS: Ubuntu 18.10 x86_64                                                                                            
    .ossssssssssssssssssdMMMNysssso.       Host: VirtualBox 1.2                                                                                               
   /ssssssssssshdmmNNmmyNMMMMhssssss/      Kernel: 4.18.0-15-generic                                                                                          
  +ssssssssshmydMMMMMMMNddddyssssssss+     Uptime: 2 mins                                                                                                     
 /sssssssshNMMMyhhyyyyhmNMMMNhssssssss/    Packages: 2188 (dpkg)                                                                                              
.ssssssssdMMMNhsssssssssshNMMMdssssssss.   Shell: bash 4.4.19                                                                                                 
+sssshhhyNMMNyssssssssssssyNMMMysssssss+   Resolution: 800x600                                                                                                
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   DE: LXQt                                                                                                           
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   WM: Openbox                                                                                                        
+sssshhhyNMMNyssssssssssssyNMMMysssssss+   Theme: Arc-Darker [GTK3]                                                                                           
.ssssssssdMMMNhsssssssssshNMMMdssssssss.   Icons: Adwaita [GTK3]                                                                                              
 /sssssssshNMMMyhhyyyyhdNMMMNhssssssss/    Terminal: qterminal                                                                                                
  +sssssssssdmydMMMMMMMMddddyssssssss+     CPU: Intel i5-4200U (1) @ 2.294GHz                                                                                 
   /ssssssssssshdmNNNNmyNMMMMhssssss/      GPU: VMware SVGA II Adapter                                                                                        
    .ossssssssssssssssssdMMMNysssso.       Memory: 357MiB / 985MiB                                                                                            
      -+sssssssssssssssssyyyssss+-                                                                                                                            
        `:+ssssssssssssssssss+:`                                                                                                                              
            .-/+oossssoo+/-.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1799855

Title:
  distribution upgrade bug - upgrading to 18.10

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Cosmic:
  Fix Committed

Bug description:
  [Impact]

  Without this, upgrades from Lubuntu 18.04 to 18.10 don't work properly
  and display an error as shown below.

  [Test Case]

  Using a Lubuntu 18.04 system, ensuring that "Prompt=normal" is set in
  /etc/update-manager/release-upgrades, run `do-release-upgrade -p`.

  [Regression Potential]

  Little to none. This could only regress if lubuntu-core was re-
  introduced into Cosmic, which is very unlikely at this point in time.

  [Original Description]

  Can't install 'lubuntu-core'

  It was impossible to install a required package. Please report this as
  a bug using 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.27
  ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
  Uname: Linux 4.15.0-38-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: LXDE
  Date: Wed Oct 24 21:58:18 2018
  InstallationDate: Installed on 2018-06-17 (129 days ago)
  InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2018-10-25 (0 days ago)
  VarLogDistupgradeTermlog:

  mtime.conffile..etc.update-manager.release-upgrades:
  2018-06-17T14:56:38.161228

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