I found 30_os_prober.bak in /etc/grub.d. I compared the two & deleted 30_os_prober & rennaming 30_os_prober.bak. Installation then proceeded.
Mark as solved. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed in Ubuntu. https://bugs.launchpad.net/bugs/1960565 Title: package linux-image-5.4.0-99-generic 5.4.0-99.112 failed to install/upgrade Status in linux-signed package in Ubuntu: New Bug description: Running sudo dpkg --configure -a returns the following Setting up linux-image-5.4.0-99-generic (5.4.0-99.112) ... Processing triggers for linux-image-5.4.0-99-generic (5.4.0-99.112) ... /etc/kernel/postinst.d/initramfs-tools: update-initramfs: Generating /boot/initrd.img-5.4.0-99-generic /etc/kernel/postinst.d/zz-update-grub: Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found background image: Methane_Rose_B_by_skamradt.jpg Found linux image: /boot/vmlinuz-5.13.0-28-generic Found initrd image: /boot/initrd.img-5.13.0-28-generic Found linux image: /boot/vmlinuz-5.13.0-27-generic Found initrd image: /boot/initrd.img-5.13.0-27-generic Found linux image: /boot/vmlinuz-5.4.0-99-generic Found initrd image: /boot/initrd.img-5.4.0-99-generic /etc/grub.d/30_os-prober: 39: Syntax error: "fi" unexpected (expecting "then") run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 2 dpkg: error processing package linux-image-5.4.0-99-generic (--configure): installed linux-image-5.4.0-99-generic package post-installation script subprocess returned error exit status 1 Errors were encountered while processing: linux-image-5.4.0-99-generic ProblemType: Package DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-99-generic 5.4.0-99.112 ProcVersionSignature: Ubuntu 5.13.0-28.31~20.04.1-generic 5.13.19 Uname: Linux 5.13.0-28-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.21 AptOrdering: linux-generic-hwe-18.04:amd64: Install linux-libc-dev:amd64: Install NULL: ConfigurePending Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jeff 12206 F.... pulseaudio /dev/snd/pcmC1D0p: jeff 12206 F...m pulseaudio /dev/snd/controlC0: jeff 12206 F.... pulseaudio CasperMD5CheckResult: skip Date: Mon Feb 7 14:01:26 2022 DpkgHistoryLog: Start-Date: 2022-02-07 14:00:51 Requested-By: jeff (1000) Upgrade: linux-libc-dev:amd64 (5.4.0-97.110, 5.4.0-99.112), linux-generic-hwe-18.04:amd64 (5.4.0.97.101, 5.4.0.99.103) ErrorMessage: installed linux-image-5.4.0-99-generic package post-installation script subprocess returned error exit status 1 MachineType: Dell Inc. Inspiron 5575 ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-28-generic root=UUID=b91e31b8-e61f-4428-afa9-5ff99f9abadc ro quiet splash idle=nomwait acpi_backlight=vendor PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2 PythonDetails: /usr/bin/python3.8, Python 3.8.10, python-is-python3, 3.8.2-4 RelatedPackageVersions: grub-pc N/A SourcePackage: linux-signed Title: package linux-image-5.4.0-99-generic 5.4.0-99.112 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 2 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/31/2019 dmi.bios.release: 5.3 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.3.3 dmi.board.asset.tag: not specified dmi.board.name: 0M0Y6P dmi.board.vendor: Dell Inc. dmi.board.version: X01 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 1.3.3 dmi.modalias: dmi:bvnDellInc.:bvr1.3.3:bd10/31/2019:br5.3:svnDellInc.:pnInspiron5575:pvr1.3.3:rvnDellInc.:rn0M0Y6P:rvrX01:cvnDellInc.:ct10:cvr1.3.3:sku0812: dmi.product.family: Inspiron dmi.product.name: Inspiron 5575 dmi.product.sku: 0812 dmi.product.version: 1.3.3 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1960565/+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
