Public bug reported:
I've had this installed for a long time without error, but after a
recent kernel update, it now fails:
> Building module(s)... done.
> Signing module /var/lib/dkms/v4l2loopback/0.13.2/build/v4l2loopback.ko
> Deprecated feature: CLEAN (/var/lib/dkms/v4l2loopback/0.13.2/source/dkms.conf)
> Module /lib/modules/6.14.0-15-generic/kernel/v4l2loopback/v4l2loopback.ko.zst
> already installed at version 0.13.2, override by specifying --force
>
> Error! Installation aborted.
ProblemType: Package
DistroRelease: Ubuntu 25.04
Package: v4l2loopback-dkms 0.13.2-1ubuntu1
ProcVersionSignature: Ubuntu 6.14.0-22.22-generic 6.14.5
Uname: Linux 6.14.0-22-generic x86_64
ApportVersion: 2.32.0-0ubuntu5.2
AptOrdering:
v4l2loopback-dkms:amd64: Install
NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Mon Jun 23 13:26:17 2025
ErrorMessage: installed v4l2loopback-dkms package post-installation script
subprocess returned error exit status 6
InstallationDate: Installed on 2020-12-25 (1641 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
PackageArchitecture: all
Python3Details: /usr/bin/python3.13, Python 3.13.3, python3-minimal, 3.13.3-1
PythonDetails: /usr/bin/python3.13, Python 3.13.3, python-is-python3, 3.13.3-1
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
dpkg 1.22.18ubuntu2
apt 3.0.0
SourcePackage: v4l2loopback
Title: package v4l2loopback-dkms 0.13.2-1ubuntu1 failed to install/upgrade:
installed v4l2loopback-dkms package post-installation script subprocess
returned error exit status 6
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: v4l2loopback (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-package plucky third-party-packages
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https://bugs.launchpad.net/bugs/2115227
Title:
v4l2loopback-dkms failed to install/upgrade "module already installed"
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