package nvidia-dkms-390 390.48-0ubuntu3 failed to install/upgrade: installed nvidia-dkms-390 package post-installation script subprocess returned error exit status 30

[hush bronze]

It happends during the dialog of secure boot mok enroll. That dialog didnt work well as well.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: nvidia-dkms-390 390.48-0ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
Date: Fri Apr 27 20:02:00 2018
ErrorMessage: installed nvidia-dkms-390 package post-installation script subprocess returned error exit status 30
InstallationDate: Installed on 2018-04-27 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
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: nvidia-graphics-drivers-390
Title: package nvidia-dkms-390 390.48-0ubuntu3 failed to install/upgrade: installed nvidia-dkms-390 package post-installation script subprocess returned error exit status 30
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.