Upgraded packages and this error showed up.
I had to reinstall dkms to make it work again.
ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: shim-signed 1.34.6+13-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No such file or directory: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.9-0ubuntu6
Architecture: amd64
Date: Tue Apr 24 19:02:19 2018
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 5
InstallationDate: Installed on 2015-09-28 (938 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
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
SecureBoot: 6 0 0 0 1
SourcePackage: shim-signed
Title: package shim-signed 1.34.6+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 5
UpgradeStatus: No upgrade log present (probably fresh install)
Thanks for filing a bug and helping to make Ubuntu better!
I believe the bug you have filed should be resolved with the new version of shim-signed:
shim-signed (1.34.7) bionic; urgency=medium
* debian/
packages currently installed have dkms modules built for them.
Gracefully handle any failures in the path for signing existing dkms
modules on upgrade due to absent modules. LP: #1766391.
* Add a dependency on sbsigntool for kmodsign, which we use directly.
With that being the case, could you confirm that when you upgrade to this package you are correctly prompted for a password to enroll a new MOK key?