"Solved" by upgrading from 20.04 to 22.04
I have tried all the suggested solutions,
sudo apt-get remove --purge libreoffice*
sudo apt-get update
sudo apt-get install libreoffice
sudo apt-get install libreoffice-plasma
sudo apt-get clean
sudo apt-get autoremove
including in different, logically correct sequences.
$ dpkg -l | grep libreoffice
$
$ sudo apt-get install libreoffice
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
libreoffice : Depends: libreoffice-base but it is not going to be installed
Depends: libreoffice-calc but it is not going to be installed
Depends: libreoffice-core (= 1:6.4.7-0ubuntu0.20.04.4) but it is not going to be installed
Depends: libreoffice-draw but it is not going to be installed
Depends: libreoffice-impress but it is not going to be installed
Depends: libreoffice-math but it is not going to be installed
Depends: libreoffice-report-builder-bin but it is not going to be installed
Depends: libreoffice-writer but it is not going to be installed
Depends: python3-uno (>= 4.4.0~beta2) but it is not going to be installed
Recommends: libreoffice-gnome but it is not going to be installed or
libreoffice-plasma but it is not going to be installed
Recommends: libreoffice-nlpsolver but it is not going to be installed
Recommends: libreoffice-report-builder but it is not going to be installed
Recommends: libreoffice-script-provider-bsh but it is not going to be installed
Recommends: libreoffice-script-provider-js but it is not going to be installed
Recommends: libreoffice-script-provider-python but it is not going to be installed
Recommends: libreoffice-sdbc-mysql but it is not going to be installed
Recommends: libreoffice-sdbc-postgresql but it is not going to be installed
Recommends: libreoffice-wiki-publisher but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
As requested, here the additional outputs
$ sudo apt update
Hit:1 http://de.archive.ubuntu.com/ubuntu focal InRelease
Get:2 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Hit:3 http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu focal InRelease
Get:4 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:5 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Get:6 http://security.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [40,7 kB]
Get:7 http://security.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [77,3 kB]
Get:8 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 DEP-11 Metadata [2.464 B]
Fetched 456 kB in 1s (593 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
$ apt-cache policy libreoffice-core
libreoffice-core:
Installed: (none)
Candidate: 1:6.4.7-0ubuntu0.20.04.4
Version table:
1:7.3.6-0ubuntu0.22.04.1~bpo20.04.1 100
100 http://de.archive.ubuntu.com/ubuntu focal-backports/main amd64 Packages
1:6.4.7-0ubuntu0.20.04.4 500
500 http://de.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
1:6.4.2-0ubuntu3 500
500 http://de.archive.ubuntu.com/ubuntu focal/main amd64 Packages
And here is, from the logs, when it all happened (end of previous, normal, command the day before, cut intermediate lines):
Processing triggers for man-db (2.9.1-1) ...
Log ended: 2022-09-28 09:45:10
Log started: 2022-09-29 10:26:41
(Reading database... 100%
(Reading database ... 330469 files and directories currently installed.)
Removing libreoffice-wiki-publisher (1.2.0+LibO6.4.7-0ubuntu0.20.04.4) ...
Removing libreoffice-sdbc-hsqldb (1:6.4.7-0ubuntu0.20.04.4) ...
Removing libreoffice (1:6.4.7-0ubuntu0.20.04.4) ...
...
Removing libreoffice-core (1:6.4.7-0ubuntu0.20.04.4) ...
The ubuntu version is Ubuntu 20.04.5 LTS
I haven't changed anything, not added anything. For the last months only $ sudo apt-get -y update && sudo apt-get -y dist-upgrade
Here we are off backports:
$ cat sources.list | grep back
## Also, please note that software in backports WILL NOT receive any review
## deb http://de.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
$ sudo apt update
Hit:1 http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu focal InRelease
Hit:2 http://de.archive.ubuntu.com/ubuntu focal InRelease
Get:3 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:4 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:5 http://security.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [40,7 kB]
Get:6 http://security.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [77,3 kB]
Get:7 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 DEP-11 Metadata [2.464 B]
Get:8 http://de.archive.ubuntu.com/ubuntu focal-updates/main amd64 DEP-11 Metadata [278 kB]
Get:9 http://de.archive.ubuntu.com/ubuntu focal-updates/universe amd64 DEP-11 Metadata [391 kB]
Get:10 http://de.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 DEP-11 Metadata [944 B]
Fetched 1.018 kB in 1s (1.064 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
$ sudo apt autoremove libreoffice
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'libreoffice' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$ sudo apt install libreoffice
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libreoffice : Depends: libreoffice-base but it is not going to be installed
Depends: libreoffice-calc but it is not going to be installed
Depends: libreoffice-core (= 1:6.4.7-0ubuntu0.20.04.4) but it is not going to be installed
Depends: libreoffice-draw but it is not going to be installed
Depends: libreoffice-impress but it is not going to be installed
Depends: libreoffice-math but it is not going to be installed
Depends: libreoffice-report-builder-bin but it is not going to be installed
Depends: libreoffice-writer but it is not going to be installed
Depends: python3-uno (>= 4.4.0~beta2) but it is not going to be installed
Recommends: libreoffice-gnome but it is not going to be installed or
libreoffice-plasma but it is not going to be installed
Recommends: libreoffice-nlpsolver but it is not going to be installed
Recommends: libreoffice-report-builder but it is not going to be installed
Recommends: libreoffice-script-provider-bsh but it is not going to be installed
Recommends: libreoffice-script-provider-js but it is not going to be installed
Recommends: libreoffice-script-provider-python but it is not going to be installed
Recommends: libreoffice-sdbc-mysql but it is not going to be installed
Recommends: libreoffice-sdbc-postgresql but it is not going to be installed
Recommends: libreoffice-wiki-publisher but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
$ sudo apt install libreoffice=6.4.7-0ubuntu0.20.04.4
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Version '6.4.7-0ubuntu0.20.04.4' for 'libreoffice' was not found
$ sudo apt install libreoffice=6.4.7-0ubuntu0.20.04.5
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Version '6.4.7-0ubuntu0.20.04.5' for 'libreoffice' was not found
$
What can I do to remedy the situation, please?
