[Bug 1901231] Re: package linux-image-5.8.0-25-generic 5.8.0-25.26 failed to install/upgrade: triggers looping, abandoned

Recovered by booting into an older kernel and running

sudo update-initramfs -u -k 5.8.0-25-generic
sudo update-grub

There are still some initialization failures reported at boot but at
least the 20.10 boot is successful.

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Title:
package linux-image-5.8.0-25-generic 5.8.0-25.26 failed to
install/upgrade: triggers looping, abandoned

Status in linux package in Ubuntu:
Confirmed

Bug description:
inadvertently killed upgrade from fosa to gorilla. Result won't boot:
"VFS: Unable to mount root fs on unknown-block(0,0) ]--"

ProblemType: Package
DistroRelease: Ubuntu 20.10
Package: linux-image-5.8.0-25-generic 5.8.0-25.26
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: peter 1838 F.... pulseaudio
/dev/snd/controlC2: peter 1838 F.... pulseaudio
/dev/snd/controlC1: peter 1838 F.... pulseaudio
CasperMD5CheckResult: skip
Date: Fri Oct 23 12:53:07 2020
ErrorMessage: triggers looping, abandoned
InstallationDate: Installed on 2018-10-22 (731 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
MachineType: Gigabyte Technology Co., Ltd. GA-78LMT-USB3 6.0
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-52-generic root=UUID=6a885885-4d9c-4d7d-abc9-70fa839e1635 ro quiet splash 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 3.8.6, python3-minimal, 3.8.6-0ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions: grub-pc 2.04-1ubuntu35
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
Title: package linux-image-5.8.0-25-generic 5.8.0-25.26 failed to install/upgrade: triggers looping, abandoned
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/25/2014
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: GA-78LMT-USB3 6.0
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: SEx
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd11/25/2014:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-USB36.0:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-USB36.0:rvrSEx:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-78LMT-USB3 6.0
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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