[Bug 1934952] Re: package shim-signed 1.48+15.4-0ubuntu5 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

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** Tags removed: need-duplicate-check

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Title:
  package shim-signed 1.48+15.4-0ubuntu5 failed to install/upgrade:
  installed shim-signed package post-installation script subprocess
  returned error exit status 1

Status in shim-signed package in Ubuntu:
  New

Bug description:
  I got this error on post installation and installing nvidia driver.
  Lenovo M92p mahobay motherboard added nvidia 710 video card.Memory is
  12gb.I5 3570 CPU 3.4 Gz Hard drive 480gb Hyundia Sapphir.System run in
  turbo mode.

  ProblemType: Package
  DistroRelease: Ubuntu 21.04
  Package: shim-signed 1.48+15.4-0ubuntu5
  ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21
  Uname: Linux 5.11.0-22-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: 2.20.11-0ubuntu65.1
  Architecture: amd64
  BootEFIContents:
   BOOTX64.CSV
   grub.cfg
   grubx64.efi
   mmx64.efi
   shimx64.efi
  CasperMD5CheckResult: unknown
  Date: Wed Jul  7 12:12:53 2021
  EFITables:
   Jul 07 21:21:33 92pubuntu8 kernel: efi: EFI v2.31 by American Megatrends
   Jul 07 21:21:33 92pubuntu8 kernel: efi: ACPI=0xdce28000 ACPI 2.0=0xdce28000 SMBIOS=0xf0480 MOKvar=0xd1471000 
   Jul 07 21:21:33 92pubuntu8 kernel: secureboot: Secure boot disabled
   Jul 07 21:21:33 92pubuntu8 kernel: secureboot: Secure boot disabled
  ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
  Python3Details: /usr/bin/python3.9, Python 3.9.5, python3-minimal, 3.9.4-1
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.20.9ubuntu1
   apt  2.2.3
  SecureBoot: 22   0   0   0   0
  SourcePackage: shim-signed
  Title: package shim-signed 1.48+15.4-0ubuntu5 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)

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