Using the same procedure I was unable to recreate this on Ubuntu 16.04.
** Changed in: initramfs-tools (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1678187
Title:
Removing a linux-image-extra package fails, if /boot is about full
Status in initramfs-tools:
New
Status in dpkg package in Ubuntu:
Invalid
Status in initramfs-tools package in Ubuntu:
Incomplete
Bug description:
System calls /etc/kernel/postinst.d/initramfs-tools when
purging/removing a linux-image-extra package. That calls "update-
initramfs -c" which needs significant amount of additional disk space
in /boot temporarily. But there is no space left, if /boot is full.
Likewise /etc/kernel/postinst.d/dkms may call "update-initramfs -u".
The fix could be to create the new initrg.img file in different partition
before replacing the old one by it in update-initramfs. So the update-initramfs
script should be fixed. But there may not be such a partition..
Anyway the likely case when space runs out is when there is a separate /boot
partition.
Alternatively the init scripts should remove the respective
/boot/initrd.img-<version> file when removing/installing the linux-image-extra
package. That could also be done by
update-initramfs -d -k <version>
That may be worse way, as then initrd.img file is missing for longer period
of time and system integrity may suffer in case of e.g. power cut.
Related question: http://askubuntu.com/q/898499/21005
The output of 'dpkg --purge' presented there shows that corresponding
linux-image package may get successfully removed while the linux-image-extra is
left broken. If the linux-image-extra package will be removed later, the
post-installation script will create an initrd.img file for a non-installed
kernel! Same would happen, if removing would be done by apt-get purge.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: initramfs-tools 0.103ubuntu4.7
ProcVersionSignature: Ubuntu 4.4.0-71.92~14.04.1-generic 4.4.49
Uname: Linux 4.4.0-71-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.23
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Mar 31 17:42:35 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-09-21 (922 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.1)
PackageArchitecture: all
SourcePackage: initramfs-tools
UpgradeStatus: No upgrade log present (probably fresh install)
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