I'm facing the same issue in KDE Neon, I ran the usual package updates in Muon around 2 weeks back and now I see this error message every time I update or install a new package.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1814113 Title: package linux-image-4.15.0-45-generic 4.15.0-45.48 failed to install/upgrade: installed linux-image-4.15.0-45-generic package post- installation script subprocess returned error exit status 1 Status in linux package in Ubuntu: Confirmed Bug description: I was installing the VirtualBox Additions 6.04 onto a Xubuntu 18.04 LTS virtual machine running on VirtualBox 6.04. ProblemType: Package DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-45-generic 4.15.0-45.48 ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18 Uname: Linux 4.15.0-43-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ciaraldi 1625 F.... pulseaudio Date: Thu Jan 31 09:28:09 2019 ErrorMessage: installed linux-image-4.15.0-45-generic package post-installation script subprocess returned error exit status 1 InstallationDate: Installed on 2018-07-27 (188 days ago) InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) IwConfig: enp0s3 no wireless extensions. lo no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 80ee:0021 VirtualBox USB Tablet Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: innotek GmbH VirtualBox ProcFB: 0 vboxdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=0d3649a8-25d3-4aa4-823a-4cda8848cb9d ro quiet splash PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04 PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1 RelatedPackageVersions: grub-pc 2.02-2ubuntu8.9 RfKill: SourcePackage: linux Title: package linux-image-4.15.0-45-generic 4.15.0-45.48 failed to install/upgrade: installed linux-image-4.15.0-45-generic package post-installation script subprocess returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.family: Virtual Machine dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1814113/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
