partial upgrade followd by package shim-signed 1.42+15+1552672080.a4a1fbe-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

[pupfish]

I have not fully investigated.
Got an unexpected notice for a partial upgrade.
Concerned that this might be FS corruption.
Not sure at this point.

During partial upgrade shim-signed gave error and got notice after reboot.
efi seems to work correctly - I have dual boot.

ProblemType: Package
DistroRelease: Ubuntu 20.10
Package: shim-signed 1.42+15+1552672080.a4a1fbe-0ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-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: 2.20.11-0ubuntu44
Architecture: amd64
BootEFIContents:
 BOOTX64.CSV
 grub.cfg
 grubx64.efi
 mmx64.efi
 shimx64.efi
CasperMD5CheckResult: skip
Date: Tue Aug 11 12:35:59 2020
EFITables:
 Aug 11 12:40:15 DaVinciCode kernel: efi: EFI v2.70 by American Megatrends
 Aug 11 12:40:15 DaVinciCode kernel: efi: ACPI 2.0=0x8e5ae000 ACPI=0x8e5ae000 SMBIOS=0x8f175000 SMBIOS 3.0=0x8f174000 MEMATTR=0x89b9f018 MPS=0xfcb30 ESRT=0x889cf698
 Aug 11 12:40:15 DaVinciCode kernel: secureboot: Secure boot disabled
 Aug 11 12:40:15 DaVinciCode kernel: esrt: Reserving ESRT space from 0x00000000889cf698 to 0x00000000889cf6d0.
 Aug 11 12:40:15 DaVinciCode kernel: secureboot: Secure boot disabled
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2020-02-16 (177 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu4
 apt 2.1.7
SecureBoot: 6 0 0 0 0
SourcePackage: shim-signed
Title: package shim-signed 1.42+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)

[Steve Langasek (vorlon)]

The error in your log is:

Setting up shim-signed (1.42+15+1552672080.a4a1fbe-0ubuntu2) ...
Installing for x86_64-efi platform.
grub-install: error: cannot open `/boot/efi/EFI/ubuntu/grubx64.efi': Read-only file system.
dpkg: error processing package shim-signed (--configure):
 installed shim-signed package post-installation script subprocess returned error exit status 1

Your ESP (/boot/efi) must be mounted read-write at the time of upgrade. This is how Ubuntu configures it by default.

[pupfish (billyg-pupfishdesign)]

Thank you.

Discovered that prior to reading your reply.

Sorry for the false alarm.