Upgrade fails to automattically install modules with a new kernel

[Karl Kastner]

I report this, because the problem has occurred several times during recent upgrades:

A new kernel was installed during the upgrade, but the accompanying kernel modules were not. As a consequence, the twofish modules were missing, and encrypted volumes did not mount anymore. This resulted in the error messages:

[ 366.866643] device-mapper: table: 253:0: crypt: unknown target type
[ 366.867506] device-mapper: ioctl: error adding target to table

lsmod and /proc/crypto revealed, that the twofish modules were not loaded. Off course they were not, because /lib/modules/4.10.0-37-generic/ did not exist. Apparently, linux-image-extra-4.10.0-37-generic had not been installed alongside linux-image-4.10.0-37-generic during the most recent upgrade. After manually installing linux-image-extra, the encrypted volume mounted without problems.

The package linux-image-extra should always be installed automatically with a new kernel, if it was installed for the old kernel, to avoid this and similar problems.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: update-manager 1:16.04.10
ProcVersionSignature: Ubuntu 4.10.0-37.41-generic 4.10.17
Uname: Linux 4.10.0-37-generic x86_64
NonfreeKernelModules: nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: GNOME
Date: Wed Oct 25 10:35:36 2017
GsettingsChanges: b'com.ubuntu.update-manager' b'first-run' b'false'
InstallationDate: Installed on 2015-11-05 (719 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)