package ubuntustudio-lowlatency-settings 20.04.2.1 failed to install/upgrade: installed ubuntustudio-lowlatency-settings package post-installation script subprocess returned error exit status 1

[Albert Harper]

na

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: ubuntustudio-lowlatency-settings 20.04.2.1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.4
AptOrdering:
 ubuntustudio-lowlatency-settings:amd64: Install
 grub-efi-amd64-signed:amd64: Install
 grml-rescueboot:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Jul 24 01:15:30 2020
ErrorMessage: installed ubuntustudio-lowlatency-settings package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2020-07-20 (3 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.3
SourcePackage: ubuntustudio-default-settings
Title: package ubuntustudio-lowlatency-settings 20.04.2.1 failed to install/upgrade: installed ubuntustudio-lowlatency-settings package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Erich Eickmeyer (eeickmeyer)]

While they may have occurred while upradeing ubuntustudio-lowlatency-settings, the key is here:

device-mapper: reload ioctl on osprober-linux-sda4 failed: Device or resource busy
Command failed.

This tells me that it wasn't the package itself that failed, but rather, os-proper or grub failed to open a necessary device during the grub-update command.