Ludovis,

first of all: thank you for taking the time to ponder over my plight and
to answer.

On Saturday, 7 November 2020 16:42:33 -03 Ludovic Bellière wrote:
> Eike,
>
> The message tells you that packages depends on libsystemd0, but that
> requirement is provided by libelogind0. In any case, libelogind0 will
> be a stand-in for libsystemd0. If apt chose to remove packages you
> use, you can still install them back after.
I understand that but neither apt nor aptitude understand that. There
is no artificial intelligence built into the package managers which say:
"Ah, OK, libelogind0 is replacing libsystemd0 and it provides the same
services and APIs." Neither is apt capable of deinstalling libsystemd0
nor installing libelogind0. Apt nor aptitude neither are able to
deinstall all the dependant packages even if I would like them to be
deinstalled. Although deinstallation of openssh-server also is a no-no
if one relys on a remote ssh connection - not? But whatever ...

>
> The warning is of no consequence here because you're replacing a
> library with its counterpart.
This is not a warning, it is an error-message which tells me that apt is
unable to resolve the situation no matter what. It does not warn me that
I'm about to delete all those packages but that it right away refuses to
do anything of the kind. I would be happy if it at least deinstalled all
the dependencies. I could handle that. But it refuses.
This is a hen-and-egg-problem. The problem is not that I do not
understand warnings but that I am confronted with a situation of a
circle-dependency which cannot be resolved by neither apt nor aptitude.
I'm on a merry-go-round and can't get off.

I'll try to purge --force-depends libsystemd0. But for doing this I first
have to download the package (and libelogind0) because I autocleaned
/var/cache/apt/archives.
Hand over to me the crowbar, please!
>
> On Sat, 07 Nov 2020 16:22:24 -0300
>
> Eike Lantzsch via Dng <dng@???> wrote:
> > On Saturday, 7 November 2020 15:52:25 -03 Ludovic Bellière wrote:
> > > Hi Eike,
> > >
> > > Install libelogind0 first, so it takes precedence over systemd,
> > > then
> > > elogind.
> >
> > Thanks - but ->
> > That is impossible because of a catch-22.It is not even possible to
> > deinstall/purge libsystemd0it seems to be there to haunt me.
> >
> > Copy and paste off aptitude introduced some not-so-nice
> > esc-sequences
> > into the text. I hope that it will not mess-up the message too much.
> >
> > *libsystemd0 (remove, 241-7~deb10u4)* will be removed. The following
> > packages depend on *libsystemd0 (remove, 241-7~deb10u4)* and will be
> > broken by its removal:
> > * * *libaccountsservice0 (held/unchanged, 0.6.45-2) *depends on*
> > libsystemd0 (>= 209) (provided by libelogind0 241.4-2)
> > * * *libapt-pkg5.0 (held/unchanged, 1.8.2.1) *depends on*
> > libsystemd0
> > (>= 221) (provided by libelogind0 241.4-2)
> > * * *libpulse0 (held/unchanged, 12.2-4+deb10u1) *depends on*
> > libsystemd0 (provided by libelogind0 241.4-2)
> > * * *network-manager (held/unchanged, 1.14.6-2+deb10u1) *depends on*
> > libsystemd0 (>= 221) (provided by libelogind0 241.4-2)
> > * * *openssh-server (held/unchanged, 1:7.9p1-10+deb10u2) *depends
> > on*
> > libsystemd0 (provided by libelogind0 241.4-2)
> > * * *pulseaudio (held/unchanged, 12.2-4+deb10u1) *depends on*
> > libsystemd0 (provided by libelogind0 241.4-2)
> > * * *rsyslog (held/unchanged, 8.1901.0-1+devuan3~beowulf1) *depends
> > on* libsystemd0 (provided by libelogind0 241.4-2)
> > * * *samba-libs (held/unchanged, 2:4.9.5+dfsg-5+deb10u1) *depends
> > on*
> > libsystemd0 (provided by libelogind0 241.4-2)
> >
> > * * *sane-utils (held/unchanged, 1.0.27-3.2) *depends on*
> >
> > libsystemd0 (provided by libelogind0 241.4-2)
> > * * *sddm (held/unchanged, 0.18.0-1+deb10u1) *depends on*
> > libsystemd0
> > (provided by libelogind0 241.4-2)
> > * * *vlc-plugin-base (held/unchanged, 3.0.11-0+deb10u1) *depends on*
> > libsystemd0 (provided by libelogind0 241.4-2)
> > * * *xserver-xorg-core (held/unchanged, 2:1.20.4-1+deb10u1) *depends
> > on* libsystemd0 (provided by libelogind0 241.4-2)
> >
> > I have no idea how or why this situation came to be.


--
Eike Lantzsch ZP6CGE
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