Virtual Box Guest Additions won't build

[schollsky]

Hi there,

this is from the log file:

stefan@Ubuntu-hirsute:/var/log$ more vboxadd-setup.log
Building the main Guest Additions 6.1.18 module for kernel 5.11.0-16-generic.
Building the shared folder support module.
Building the graphics driver module.
Error building the module. Build output follows.
make V=1 CONFIG_MODULE_SIG= CONFIG_MODULE_SIG_ALL= -C /lib/modules/5.11.0-16-gen
eric/build M=/tmp/vbox.0 SRCROOT=/tmp/vbox.0 -j1 modules
test -e include/generated/autoconf.h -a -e include/config/auto.conf || (
 \
echo >&2; \
echo >&2 " ERROR: Kernel configuration is invalid."; \
echo >&2 " include/generated/autoconf.h or include/config/auto.conf are
missing.";\
echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it.
"; \
echo >&2 ; \
/bin/false)

Best regards

Stefan

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: virtualbox-guest-additions-iso 6.1.18-1
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 21 11:59:21 2021
InstallationDate: Installed on 2021-02-01 (79 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210123)
PackageArchitecture: all
SourcePackage: virtualbox-guest-additions-iso
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel Letzeisen (dtl131)]

"Building the main Guest Additions 6.1.18"

Ubuntu 21.04 should have VirtualBox 6.1.20:
https://launchpad.net/ubuntu/+source/virtualbox-guest-additions-iso/6.1.20-1

Make sure your system is up to date.