purging a kernel causes unneeded recreation of initramfs

[Ralf Hildebrandt]

I removed an old, not currently booted kernel:

 apt-get purge linux-image-4.4.0-135-generic linux-image-extra-4.4.0-135-generic
Paketlisten werden gelesen … Fertig
Abhängigkeitsbaum wird aufgebaut.
Statusinformationen werden eingelesen. … Fertig
Die folgenden Pakete werden ENTFERNT:
  linux-image-4.4.0-135-generic* linux-image-extra-4.4.0-135-generic*
0 aktualisiert, 0 neu installiert, 2 zu entfernen und 0 nicht aktualisiert.
Nach diesem Vorgang werden 224 M B Plattenplatz freigegeben.
Möchten Sie fortfahren? [J/n] y
(Datenbank wird gelesen … 130438 Dateien und Verzeichnisse sind derzeit installiert.)
linux-image-extra-4.4.0-135-generic (4.4.0-135.161) wird entfernt …
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
update-initramfs: Generating /boot/initrd.img-4.4.0-135-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
Grub-Konfigurationsdatei wird generiert …
Linux-Abbild gefunden: /boot/vmlinuz-4.4.0-137-generic
initrd-Abbild gefunden: /boot/initrd.img-4.4.0-137-generic
Linux-Abbild gefunden: /boot/vmlinuz-4.4.0-135-generic
initrd-Abbild gefunden: /boot/initrd.img-4.4.0-135-generic
Found memtest86+ image: /memtest86+.elf
Found memtest86+ image: /memtest86+.bin
erledigt
Konfigurationsdateien von linux-image-extra-4.4.0-135-generic (4.4.0-135.161) werden gesäubert …
linux-image-4.4.0-135-generic (4.4.0-135.161) wird entfernt …
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
update-initramfs: Deleting /boot/initrd.img-4.4.0-135-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
Grub-Konfigurationsdatei wird generiert …
Linux-Abbild gefunden: /boot/vmlinuz-4.4.0-137-generic
initrd-Abbild gefunden: /boot/initrd.img-4.4.0-137-generic
Found memtest86+ image: /memtest86+.elf
Found memtest86+ image: /memtest86+.bin
erledigt
The link /vmlinuz.old is a damaged link
Removing symbolic link vmlinuz.old
 you may need to re-run your boot loader[grub]
The link /initrd.img.old is a damaged link
Removing symbolic link initrd.img.old
 you may need to re-run your boot loader[grub]
Konfigurationsdateien von linux-image-4.4.0-135-generic (4.4.0-135.161) werden gesäubert …
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-135-generic /boot/vmlinuz-4.4.0-135-generic

Although the kernel was scheduled for removal, the lenghty creation of initramfs was run....

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-generic 4.4.0.137.143
ProcVersionSignature: Ubuntu 4.4.0-137.163-generic 4.4.144
Uname: Linux 4.4.0-137-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Okt 17 11:18 seq
 crw-rw---- 1 root audio 116, 33 Okt 17 11:18 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Wed Oct 17 11:21:19 2018
HibernationDevice: RESUME=UUID=b1ab759c-f679-4e71-af05-24c040877711
InstallationDate: Installed on 2012-05-07 (2353 days ago)
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1)
IwConfig:
 lo no wireless extensions.

 ens192 no wireless extensions.
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: VMware, Inc. VMware Virtual Platform
PciMultimedia:

ProcFB: 0 svgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-137-generic root=/dev/mapper/vgsys-root ro
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-137-generic N/A
 linux-backports-modules-4.4.0-137-generic N/A
 linux-firmware 1.157.20
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2017-06-10 (493 days ago)
dmi.bios.date: 09/21/2015
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.name: 440BX Desktop Reference Platform
dmi.board.vendor: Intel Corporation
dmi.board.version: None
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd09/21/2015:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: VMware Virtual Platform
dmi.product.version: None
dmi.sys.vendor: VMware, Inc.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.