package shim-signed 1.40.4+15+1552672080.a4a1fbe-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

[Sreehari Jeevan]

I got this error after I upgraded from 18.04 to 20.4.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: shim-signed 1.40.4+15+1552672080.a4a1fbe-0ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No such file or directory: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
BootEFIContents:
 BOOTX64.CSV
 grub.cfg
 grubx64.efi
 mmx64.efi
 shimx64.efi
CasperMD5CheckResult: skip
Date: Sat Oct 3 16:11:23 2020
DuplicateSignature:
 package:shim-signed:1.40.4+15+1552672080.a4a1fbe-0ubuntu2
 Setting up shim-signed (1.40.4+15+1552672080.a4a1fbe-0ubuntu2) ...
 dpkg: error processing package shim-signed (--configure):
  installed shim-signed package post-installation script subprocess returned error exit status 1
EFIBootMgr:
 BootCurrent: 0000
 Timeout: 1 seconds
 BootOrder: 0002,0000
 Boot0000* ubuntu HD(1,GPT,d6b23e00-ef2e-4b5b-9070-59df10e946c2,0x800,0x82000)/File(\EFI\UBUNTU\SHIMX64.EFI)
 Boot0002* Windows Boot Manager HD(1,GPT,d6b23e00-ef2e-4b5b-9070-59df10e946c2,0x800,0x82000)/File(\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
GrubDiff: Binary files /boot/efi/EFI/ubuntu/grubx64.efi and /usr/lib/grub/x86_64-efi-signed/grubx64.efi.signed differ
InstallationDate: Installed on 2020-03-28 (188 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.1
SecureBoot: 6 0 0 0 0
ShimDiff: Binary files /boot/efi/EFI/ubuntu/shimx64.efi and /usr/lib/shim/shimx64.efi.signed differ
SourcePackage: grub2
Title: package shim-signed 1.40.4+15+1552672080.a4a1fbe-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1896127, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.