[Bug 1930077] Re: installed shim-signed package post-installation script subprocess returned error exit status 1

[Sai Vinoba]

This also affects UM 21.04. Possibly others.

Also, this happens with both Secure Boot on as well off. I read bugs
#1928434 and #1925010 but they were upgrades and fresh installation
worked. In my case installation itself is failing.

On UM though, even after installed showed failed message, I went ahead
and choose the new entry from Grub menu (of another install) but the
screen stays on UM logo. Using text mode shows some sort of kernel panic
or unable to mount message which I could not capture.

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Title:
  installed shim-signed package post-installation script subprocess
  returned error exit status 1

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Release: Kubuntu 21.04
  SW, version: ubiquity, 21.04.19

  How to reproduce:
  1) Try installing Kubuntu (I tried from live-session, not tried direct install)

  Expected:
  Installation completes normally.

  Actual:
  Installer crashes with error message `installed shim-signed package post-installation script subprocess returned error exit status 1`.


  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: ubiquity 21.04.19
  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: pass
  CasperVersion: 1.461
  CurrentDesktop: KDE
  Date: Fri May 28 20:01:57 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  RebootRequiredPkgs:
   linux-image-5.11.0-16-generic
   linux-image-5.11.0-17-generic
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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