Re: [Bug 1555237] Re: Upgradefrom 14.04.4→16.04 dies midway taking out the session.

[Tim]

On 31/03/16 08:49, Steve Langasek wrote:
> This is categorically false.  We have supported upgrades without leaving the
> desktop session for over a decade in Ubuntu.
I'm pretty sure we (Ubuntu GNOME) will loose the auth channel to gdm after upgrade, which will break the session next time the screen locks, but
should cause epic upgrade failures like this bug.

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Title:
  Upgrade from 14.04.4→ 16.04 dies midway taking out the session.

Status in dbus package in Ubuntu:
  In Progress
Status in systemd package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid

Bug description:
  STEPS:
  1. Install 14.04.4 on a uefi securebooted system
  2. update it
  3. Install openssh-server for debug access
  4. reboot
  5. Hit alt+f2
  6. Type update-manager -d and hit enter

  EXPECTED:
  I expected a smooth transition to 16.04

  ACTUAL:
  System is completely taken out mid way through the process killing the session and x also no tty when hitting ctrl+alt+f1-6

  ---

  TESTS RESULTS (from cyphermox):

  On amd64 (no EFI) under qemu/libvirt, qxl graphics:
  - upgrading just libglib2.0-0 from 16.04 on top of 14.04.4: PASS
  - upgrading ubuntu-desktop (running gnome-shell) 14.04.4 to 16.04: PASS
  - upgrading ubuntu-desktop (running xubuntu-session) 14.04.4 to 16.04: PASS
  - manually upgrading compiz and other packages to 16.04 versions; after adding xenial sources:
    - compiz and related packages (http://paste.ubuntu.com/15415280/) : PASS
    - xserver-xorg and related: PASS
    - unity and related: PASS
    - ubuntu-desktop: PASS
    - libgl1-mesa-dri: PASS
    - apt-get dist-upgrade: FAIL (screensaver may have kicked in)
  - standard upgrading 14.04.4 to 16.04; screensaver disabled: FAIL (looked fine, but upgrade eventually froze, might well be a different issue)
  - re-enabling screensaver after upgrade, before reboot: TODO (above failed)

  On ppc64el:
  - upgrading ubuntu-server 14.04.4 -> 16.04: PASS

  ---

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 4.2.0-30.36~14.04.1-generic 4.2.8-ckt3
  Uname: Linux 4.2.0-30-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  Date: Wed Mar  9 17:01:27 2016
  InstallationDate: Installed on 2016-03-04 (5 days ago)
  InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Beta amd64 (20160224)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2016-03-09 (0 days ago)
  VarLogDistupgradeTermlog:

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