After a dist-upgrade from 20.04 to 20.10, the login screen displays the new wallpaper "Groovy Gorilla", but the version ID (in the bottom left corner) is the old one.
However, the /etc/os-release est up-to-date :
$ cat /etc/os-release
NAME="Ubuntu"
VERSION="20.10 (Groovy Gorilla)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.10"
VERSION_ID="20.10"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=groovy
UBUNTU_CODENAME=groovy
$ lsb_release -rd
Description: Ubuntu 20.10
Release: 20.10
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubuntu-release-upgrader-core 1:20.10.12
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: GNOME-Flashback:GNOME
Date: Fri Oct 30 16:10:15 2020
InstallationDate: Installed on 2017-02-09 (1359 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=fr_FR
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fr_FR.UTF-8
SHELL=/usr/bin/zsh
RebootRequiredPkgs:
linux-image-5.8.0-26-generic
linux-base
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to groovy on 2020-10-26 (4 days ago)
VarLogDistupgradeAptclonesystemstate.tar.gz: Error: command ['pkexec', 'cat', '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'] failed with exit code 126: Error executing command as another user: Request dismissed
VarLogDistupgradeTermlog:
I've got the same issue. Have been looking for an answer for the last couple of weeks and just stumbled onto this.