[Bug 1950204] [NEW] stuck while booting since 20.04.3 LTS upgrade

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After the upgrade to 20.04.3 LTS booting doesn't work.

In the booting process (using the latest kernel) the computer stuck, 
showing a purple screen:    
                              UBUNTU 20.04  
                               . . . . .  

(sometimes the dots indicating "i'm busy" by changing color, sometimes
the dots are frozen)

To get the Computer running i have to try it many times, booting with
different kernels - if the booting process is successful it shows the
familiar black screen with the ubuntu logo and the animated circle.

I have already repaired the grub (option in recovery mode) and after
that re installed ubuntu completely, but the (unsteady) booting problem
still appears.

Last time i could start the Computer it worked with the 5.3.0-18-generic kernel.
These are the Kernels installed on my Computer:

ii  linux-image-5.3.0-18-generic               5.3.0-18.19+1
amd64        Signed kernel image generic

ii  linux-image-5.4.0-89-generic               5.4.0-89.100
amd64        Signed kernel image generic

ii  linux-image-generic                        5.4.0.89.93
amd64        Generic Linux kernel image


I used ubuntu 19.04 for 2 years on this computer (HP dv 6, i7-2630qm 64bit) having no problems.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.36
ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
Uname: Linux 5.3.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Mon Nov  8 20:20:32 2021
InstallationDate: Installed on 2021-11-07 (1 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: Upgraded to focal on 2021-11-07 (1 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade focal
-- 
stuck while booting since 20.04.3 LTS  upgrade
https://bugs.launchpad.net/bugs/1950204
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