[Bug 1787460] Re: Unattended upgrades removed linux-image-generic

[Julian Andres Klode]

As Adam mentioned, the top-level kernel meta packages should change
their section to metapackages, so we don't mark linux-image-generic for
autoremoval if linux-generic is removed.

I'm looking into adding additional NeverAutoRemove entries for the
metapackages to apt as

	"^linux-image-[a-z0-9]*$";
	"^linux-image-[a-z0-9]*-[a-z0-9]*$";

but I'm not sure if that catches all meta packages or more than it
should.

** Package changed: unattended-upgrades (Ubuntu) => apt (Ubuntu)

** Changed in: linux-meta (Ubuntu)
   Importance: Undecided => Critical

** Changed in: linux-meta-hwe (Ubuntu)
   Importance: Undecided => Critical

** Changed in: linux-meta-hwe (Ubuntu)
       Status: New => Triaged

** Changed in: linux-meta (Ubuntu)
       Status: New => Triaged

** Changed in: apt (Ubuntu)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1787460

Title:
  Unattended upgrades removed linux-image-generic

Status in apt package in Ubuntu:
  Triaged
Status in linux-meta package in Ubuntu:
  Triaged
Status in linux-meta-hwe package in Ubuntu:
  Triaged

Bug description:
  On a fairly fresh install of 18.04 with no modifications whatsoever to
  the unattended-upgrades configuration, it decided to remove linux-
  image-generic which also removed linux-modules-extra which caused
  sound drivers to disappear, etc.

  The relative snippet from /var/log/unattended-upgrades/unattended-
  upgrades.log is:

  2018-08-15 06:18:00,048 INFO Starting unattended upgrades script
  2018-08-15 06:18:00,048 INFO Allowed origins are: o=Ubuntu,a=bionic, o=Ubuntu,a=bionic-security, o=UbuntuESM,a=bionic
  2018-08-15 06:18:01,552 INFO Removing unused kernel packages: linux-headers-generic linux-image-generic linux-headers-4.15.0-32-generic linux-headers-4.15.0-32
  2018-08-15 06:18:01,588 WARNING Keeping auto-removable linux-headers-generic package(s) because it would also remove the following packages which should be kept in this step: libxml2 linux-image-4.15.0-32-generic linux-modules-4.15.0-32-generic linux-modules-extra-4.15.0-32-generic
  2018-08-15 06:18:09,476 INFO Packages that were successfully auto-removed: linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic linux-headers-generic linux-image-generic
  2018-08-15 06:18:09,477 INFO Packages that are kept back: linux-headers-generic
  2018-08-15 06:18:10,300 INFO Packages that will be upgraded: libxml2 linux-image-generic
  2018-08-15 06:18:10,300 INFO Writing dpkg log to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
  2018-08-15 06:18:39,238 INFO All upgrades installed
  2018-08-15 06:18:42,818 INFO Packages that were successfully auto-removed: linux-image-generic linux-modules-extra-4.15.0-32-generic
  2018-08-15 06:18:42,818 INFO Packages that are kept back:

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: unattended-upgrades 1.1ubuntu1.18.04.5
  ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
  Uname: Linux 4.15.0-32-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.9-0ubuntu7.3
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Aug 16 13:17:30 2018
  InstallationDate: Installed on 2018-07-24 (23 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180724)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: unattended-upgrades
  UpgradeStatus: No upgrade log present (probably fresh install)

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