Impossible d'installer « ubuntu-desktop »

[Georges Giralt]

L'installation d'un paquet requis était impossible. Veuillez signaler ce bogue en utilisant la commande « ubuntu-bug ubuntu-release-upgrader-core » dans un terminal.
I get this message when trying to upgrade from 20.04.5 LTS to 22.04 LTS.
I've done some forensic analysis and it appears that at some point I needed oss4-base installed as a dependency of some software I needed.
This forced removal of alsa-base and thus ubuntu-desktop. As my desktop is running fine with OSS maybe it could be feasible to have ubuntu-desktop depend either of alsa-base or oss4-base ?
Honestly I can't remember what needed oss4-base.
Thank you for your concern.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.39
ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 9 05:15:18 2022
InstallationDate: Installed on 2020-05-07 (854 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2022-09-09 (0 days ago)
VarLogDistupgradeTermlog: