Comment 0 for bug 1914278

With the machines I help administer, we have been finding situations where the /boot directory is filling-up beyond 3 kernels on LUKS encrypted systems. apt autoremove is not removing old kernels as expected.

This may also be an issue with unattended-upgrades since I found the following line commented-out by default:

// Remove unused automatically installed kernel-related packages
// (kernel images, kernel headers and kernel version locked tools).
// Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";

We have had a system with as many as 15 kernel packages installed as a result of this not working as expected.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: apt 2.0.4
ProcVersionSignature: Ubuntu 5.8.0-41.46~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-41-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Tue Feb 2 09:29:01 2021
InstallationDate: Installed on 2020-11-07 (87 days ago)
InstallationMedia: Kubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)