[Bug 1947429] [NEW] linux-object-* not autoremoved on upgrade

[Steve Langasek]

Public bug reported:

After upgrading my kernel, directories are left behind in /lib/modules
for previous kernel because with the kernel packaging layout, not all
binary packages are autoremoved:

$ dpkg -S /lib/modules/5.11.0-34-generic
linux-objects-nvidia-460-5.11.0-34-generic: /lib/modules/5.11.0-34-generic
$ sudo apt autoremove --purge linux-objects-nvidia-460-5.11.0-34-generic
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  linux-objects-nvidia-460-5.11.0-34-generic*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] 
Requesting to save current system state
Successfully saved as "autozsys_sdijbm"
(Reading database ... 362960 files and directories currently installed.)
Purging configuration files for linux-objects-nvidia-460-5.11.0-34-generic (5.11
.0-34.36) ...
dpkg: warning: while removing linux-objects-nvidia-460-5.11.0-34-generic, directory '/lib/modules/5.11.0-34-generic' not empty so not removed
ZSys is adding automatic system snapshot to GRUB menu
$

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: apt 2.3.9
ProcVersionSignature: Ubuntu 5.11.0-37.41-generic 5.11.22
Uname: Linux 5.11.0-37-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu70
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 15 14:36:40 2021
InstallationDate: Installed on 2019-12-23 (661 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: apt
UpgradeStatus: Upgraded to impish on 2021-10-15 (0 days ago)

** Affects: apt (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug impish

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https://bugs.launchpad.net/bugs/1947429

Title:
  linux-object-* not autoremoved on upgrade

Status in apt package in Ubuntu:
  New

Bug description:
  After upgrading my kernel, directories are left behind in /lib/modules
  for previous kernel because with the kernel packaging layout, not all
  binary packages are autoremoved:

  $ dpkg -S /lib/modules/5.11.0-34-generic
  linux-objects-nvidia-460-5.11.0-34-generic: /lib/modules/5.11.0-34-generic
  $ sudo apt autoremove --purge linux-objects-nvidia-460-5.11.0-34-generic
  Reading package lists... Done
  Building dependency tree... Done
  Reading state information... Done
  The following packages will be REMOVED:
    linux-objects-nvidia-460-5.11.0-34-generic*
  0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
  After this operation, 0 B of additional disk space will be used.
  Do you want to continue? [Y/n] 
  Requesting to save current system state
  Successfully saved as "autozsys_sdijbm"
  (Reading database ... 362960 files and directories currently installed.)
  Purging configuration files for linux-objects-nvidia-460-5.11.0-34-generic (5.11
  .0-34.36) ...
  dpkg: warning: while removing linux-objects-nvidia-460-5.11.0-34-generic, directory '/lib/modules/5.11.0-34-generic' not empty so not removed
  ZSys is adding automatic system snapshot to GRUB menu
  $

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: apt 2.3.9
  ProcVersionSignature: Ubuntu 5.11.0-37.41-generic 5.11.22
  Uname: Linux 5.11.0-37-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu70
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Oct 15 14:36:40 2021
  InstallationDate: Installed on 2019-12-23 (661 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: apt
  UpgradeStatus: Upgraded to impish on 2021-10-15 (0 days ago)

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