[Bug 1819640] Re: package shim-signed 1.33.1~16.04.4+15+1533136590.3beb971-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Launchpad Bug Tracker]

[Expired for shim-signed (Ubuntu) because there has been no activity for
60 days.]

** Changed in: shim-signed (Ubuntu)
       Status: Incomplete => Expired

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Title:
  package shim-signed 1.33.1~16.04.4+15+1533136590.3beb971-0ubuntu1
  failed to install/upgrade: subprocess installed post-installation
  script returned error exit status 1

Status in shim-signed package in Ubuntu:
  Expired

Bug description:
  I haven't been able to update for a very long time. Decided I'd just go to the latest release but turns out still have to update the old version first, so I'm stuck.
  No idea what shim-signed is.
  When I do: sudo apt update && sudo apt upgrade.
  I get:
  john at john-HP-Notebook:~$ sudo apt update && sudo apt upgrade.
  [sudo] password for john: 
  Hit:1 http://gb.archive.ubuntu.com/ubuntu xenial InRelease
  Hit:2 http://archive.canonical.com/ubuntu xenial InRelease          
  Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB]
  Hit:4 http://ppa.launchpad.net/brandonsnider/cdrtools/ubuntu xenial InRelease
  Get:5 http://gb.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]    
  Hit:6 http://ppa.launchpad.net/diesch/testing/ubuntu xenial InRelease          
  Hit:7 http://ppa.launchpad.net/jre-phoenix/ppa/ubuntu xenial InRelease         
  Hit:8 http://ppa.launchpad.net/kvibes/mediaelch/ubuntu xenial InRelease        
  Hit:9 http://ppa.launchpad.net/rebuntu16/avidemux+unofficial/ubuntu xenial InRelease
  Ign:10 http://ppa.launchpad.net/stebbins/handbrake-snapshots/ubuntu xenial InRelease
  Err:11 http://ppa.launchpad.net/stebbins/handbrake-snapshots/ubuntu xenial Release
    404  Not Found
  Hit:12 https://repo.skype.com/deb stable InRelease 
  Hit:13 https://deb.opera.com/opera-stable stable InRelease
  Get:14 http://security.ubuntu.com/ubuntu xenial-security/main amd64 DEP-11 Metadata [67.9 kB]
  Get:15 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [318 kB]
  Get:16 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [67.1 kB]
  Get:17 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 DEP-11 Metadata [2,460 B]
  Get:18 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 DEP-11 Metadata [116 kB]
  Get:19 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [237 kB]
  Get:20 http://security.ubuntu.com/ubuntu xenial-security/universe DEP-11 64x64 Icons [173 kB]
  Get:21 http://gb.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 DEP-11 Metadata [5,976 B]
  Get:22 http://gb.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 DEP-11 Metadata [252 kB]
  Get:23 http://gb.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [345 kB]
  Reading package lists... Done                                                  
  N: Ignoring file 'medibuntu.list.save.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  E: The repository 'http://ppa.launchpad.net/stebbins/handbrake-snapshots/ubuntu xenial Release' does not have a Release file.
  N: Updating from such a repository can't be done securely, and is therefore disabled by default.
  N: See apt-secure(8) manpage for repository creation and user configuration details.
  john at john-HP-Notebook:~$

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: shim-signed 1.33.1~16.04.4+15+1533136590.3beb971-0ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-142.168-generic 4.4.167
  Uname: Linux 4.4.0-142-generic x86_64
  NonfreeKernelModules: wl
  .proc.sys.kernel.moksbstate_disabled: 0
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Tue Mar 12 11:26:38 2019
  EFITables:
   Mar 12 10:28:16 john-HP-Notebook kernel: efi: EFI v2.31 by INSYDE Corp.
   Mar 12 10:28:16 john-HP-Notebook kernel: efi:  ESRT=0xbf09bc18  ACPI=0xbfbfe000  ACPI 2.0=0xbfbfe014  SMBIOS=0xbf97ef98 
   Mar 12 10:28:16 john-HP-Notebook kernel: esrt: Reserving ESRT space from 0x00000000bf09bc18 to 0x00000000bf09bc50.
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2016-04-30 (1046 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.5
   apt  1.2.29ubuntu0.1
  SecureBoot: 6   0   0   0   0
  SourcePackage: shim-signed
  Title: package shim-signed 1.33.1~16.04.4+15+1533136590.3beb971-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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