Public bug reported:
Happened after upgrading to 18.04 from 16.04. Ubuntu fails to boot with
kernel 4.15 as well.
ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-20-generic 4.15.0-20.21
ProcVersionSignature: Ubuntu 4.13.0-39.44-generic 4.13.16
Uname: Linux 4.13.0-39-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
AptOrdering:
linux-image-4.15.0-20-generic:amd64: Remove
NULL: ConfigurePending
Architecture: amd64
Date: Tue May 29 16:12:20 2018
DpkgTerminalLog:
Removing linux-image-4.15.0-20-generic (4.15.0-20.21) ...
Failed to create or replace /vmlinuz.old: Is a directory at
/usr/bin/linux-update-symlinks line 72.
dpkg: error processing package linux-image-4.15.0-20-generic (--remove):
installed linux-image-4.15.0-20-generic package post-removal script
subprocess returned error exit status 21
DuplicateSignature:
package:linux-image-4.15.0-20-generic:4.15.0-20.21
Removing linux-image-4.15.0-20-generic (4.15.0-20.21) ...
Failed to create or replace /vmlinuz.old: Is a directory at
/usr/bin/linux-update-symlinks line 72.
dpkg: error processing package linux-image-4.15.0-20-generic (--remove):
installed linux-image-4.15.0-20-generic package post-removal script
subprocess returned error exit status 21
ErrorMessage: installed linux-image-4.15.0-20-generic package post-removal
script subprocess returned error exit status 21
InstallationDate: Installed on 2016-05-10 (748 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal,
2.7.15~rc1-1
RelatedPackageVersions:
dpkg 1.19.0.5ubuntu2
apt 1.6.1
SourcePackage: linux-signed
Title: package linux-image-4.15.0-20-generic 4.15.0-20.21 failed to
install/upgrade: installed linux-image-4.15.0-20-generic package post-removal
script subprocess returned error exit status 21
UpgradeStatus: Upgraded to bionic on 2018-05-05 (24 days ago)
** Affects: linux-signed (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-package bionic
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https://bugs.launchpad.net/bugs/1773990
Title:
package linux-image-4.15.0-20-generic 4.15.0-20.21 failed to
install/upgrade: installed linux-image-4.15.0-20-generic package post-
removal script subprocess returned error exit status 21
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