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

[Telmo Silva]

Happened when upgrading. Ubuntu 18.04

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
NonfreeKernelModules: nvidia_modeset nvidia
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No such file or directory: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.9-0ubuntu6
Architecture: amd64
Date: Wed Apr 25 00:14:37 2018
EFIBootMgr:
 BootCurrent: 0005
 Timeout: 1 seconds
 BootOrder: 0000,0002
 Boot0000* ubuntu HD(1,GPT,cc1a140f-9f61-49cc-bbc1-3fe467c3b3b8,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)
 Boot0002* Hard Drive BBS(HD,,0x0)..GO..NO........o.S.a.n.D.i.s.k. .S.D.8.S.N.8.U.5.1.2.G.1.0.0.2....................A...........................>..Gd-.;.A..MQ..L.7.1.6.1.5.7.0.8.6.1.7.3. . . . . . . . ........BO
EFITables:
 abr 24 13:54:55 notblue kernel: efi: EFI v2.60 by American Megatrends
 abr 24 13:54:55 notblue kernel: efi: ACPI 2.0=0x8a963000 ACPI=0x8a963000 SMBIOS=0x8b1ff000 SMBIOS 3.0=0x8b1fe000 MPS=0xfcb30 ESRT=0x8847b798
 abr 24 13:54:55 notblue kernel: secureboot: Secure boot could not be determined (mode 0)
 abr 24 13:54:55 notblue kernel: esrt: Reserving ESRT space from 0x000000008847b798 to 0x000000008847b7d0.
 abr 24 13:54:56 notblue kernel: Bluetooth: hci0: Secure boot is enabled
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 5
InstallationDate: Installed on 2018-04-15 (9 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404)
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 0
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)

[Steve Langasek (vorlon)]

You are upgrading to an outdated version of shim-signed. The current version in bionic is shim-signed 1.34.9, which has the fix for this upgrade bug.