[Bug 1466965] Re: update-initramfs is called twice for the same kernel

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** Changed in: dpkg (Debian)
       Status: Unknown => New

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https://bugs.launchpad.net/bugs/1466965

Title:
  update-initramfs is called twice for the same kernel

Status in dpkg package in Ubuntu:
  New
Status in initramfs-tools package in Ubuntu:
  Triaged
Status in dpkg package in Debian:
  New

Bug description:
  When installing/upgrading packages (e. g. a kernel and initramfs-tools),
  the same initrd is generated twice. Example from Ubuntu 24.04 (noble):

  ```
  $ apt-get install --no-install-recommends -y zstd initramfs-tools linux-image-generic
  [...]
  Setting up initramfs-tools-core (0.142ubuntu25.5) ...
  Setting up initramfs-tools (0.142ubuntu25.5) ...
  update-initramfs: deferring update (trigger activated)
  Processing triggers for libc-bin (2.39-0ubuntu8.4) ...
  Processing triggers for linux-image-6.8.0-54-generic (6.8.0-54.56) ...
  /etc/kernel/postinst.d/initramfs-tools:
  update-initramfs: Generating /boot/initrd.img-6.8.0-54-generic
  Processing triggers for initramfs-tools (0.142ubuntu25.5) ...
  update-initramfs: Generating /boot/initrd.img-6.8.0-54-generic
  ```

  This behavior is caused by the kernel postinst running `run-parts
  /etc/kernel/postinst.d` where `/etc/kernel/postinst.d/initramfs-tools`
  calls update-initramfs. The initramfs-tools package uses the update-
  initramfs dpkg trigger. This trigger is executed later and calls
  `update-initramfs -u` (which updates the initrd for the latest
  kernel).

  Original report
  ===============

  A discussion that has come up before,  but I figured I'd file a bug.

  When you 'apt-get install <some-packages>' often times:
   a.) update-initramfs is called more than once for the same kernel
   b.) update-initramfs might not even be called (such as in bug 1466960).

  some conversation with infinity in #ubuntu-devel [1] indicates that he
  and apw have discussed how to do solve this.

  [1] http://irclogs.ubuntu.com/2015/06/19/%23ubuntu-devel.html#t18:04

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: initramfs-tools 0.103ubuntu15
  ProcVersionSignature: User Name 3.19.0-21.21-generic 3.19.8
  Uname: Linux 3.19.0-21-generic x86_64
  ApportVersion: 2.17.3-0ubuntu4
  Architecture: amd64
  Date: Fri Jun 19 18:19:15 2015
  Ec2AMI: ami-00000425
  Ec2AMIManifest: FIXME
  Ec2AvailabilityZone: nova
  Ec2InstanceType: m1.small
  Ec2Kernel: aki-00000002
  Ec2Ramdisk: ari-00000002
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: initramfs-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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