The newest ubuntu-kernel 5.4.0-56-generic does not boot on my machine.

[Jörn Seger]

The newest ubuntu-kernel 5.4.0-56-generic does not boot on my machine.
All older Kubuntu 20.04LTS kernel booted without problems

Ryzen 3950X CPU, Asus B450 Booard, Asus 2070super GPU

sudo lspci -vvnn > lspci-vvnn.log

see attachment

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-54-generic 5.4.0-54.60
ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
Uname: Linux 5.4.0-54-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jseger 2001 F.... pulseaudio
 /dev/snd/pcmC0D7p: jseger 2001 F...m pulseaudio
 /dev/snd/controlC1: jseger 2001 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Thu Dec 3 20:06:40 2020
InstallationDate: Installed on 2020-04-16 (231 days ago)
InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: System manufacturer System Product Name
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-54-generic root=/dev/mapper/vgkubuntu-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-54-generic N/A
 linux-backports-modules-5.4.0-54-generic N/A
 linux-firmware 1.187.4
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-05-10 (206 days ago)
dmi.bios.date: 06/17/2020
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3103
dmi.board.asset.tag: Default string
dmi.board.name: ROG STRIX B450-I GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3103:bd06/17/2020:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGSTRIXB450-IGAMING:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

Can you please attach `journalctl -b -1` on the next boot of failed boot?

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]