[SOLVED] cannot upgrade because of libzstd1-related problem

[baldyeti]

hello, i have over 250 pending upgrades, but they won' install (see below)

to be clear this install did not start from a kubuntu beta but from the budgie one which i was curious to try
I later installed the plasma5 desktop and purged the system from budgie
updates/upgrades went fine since then (about two weeks I guess) but now i cannot install anything

I found a seemingly related report on lauchapd: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1764858
has anyone seen (and solved) a similar problem ?

Extracting templates from packages: 100%
Preconfiguring packages ...
setting xserver-xorg-legacy/xwrapper/allowed_users from configuration file
dpkg-deb: error while loading shared libraries: libzstd.so.1: cannot open shared object file: No such file or directory
dpkg: error processing archive /var/cache/apt/archives/libperl5.26_5.26.1-6_amd64.deb (--unpack):
dpkg-deb --control subprocess returned error exit status 127
dpkg-deb: error while loading shared libraries: libzstd.so.1: cannot open shared object file: No such file or directory
dpkg: error processing archive /var/cache/apt/archives/perl_5.26.1-6_amd64.deb (--unpack):
dpkg-deb --control subprocess returned error exit status 127
dpkg-deb: error while loading shared libraries: libzstd.so.1: cannot open shared object file: No such file or directory
dpkg: error processing archive /var/cache/apt/archives/perl-base_5.26.1-6_amd64.deb (--unpack):
dpkg-deb --control subprocess returned error exit status 127
Errors were encountered while processing:
/var/cache/apt/archives/libperl5.26_5.26.1-6_amd64.deb
/var/cache/apt/archives/perl_5.26.1-6_amd64.deb
/var/cache/apt/archives/perl-base_5.26.1-6_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

[GreyGeek]

Did you remove budgie sources from /apt/sources.list?


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[baldyeti]

Hello "GreyGeek", thanks for asking. Actually I managed to solve the problem by force-extracting the content of the libzstd1 deb archive. That restored the missing shared library and after that all seems to work normally (all updates installed).

[GreyGeek]

Hello "GreyGeek", thanks for asking. Actually I managed to solve the problem by force-extracting the content of the libzstd1 deb archive. That restored the missing shared library and after that all seems to work normally (all updates installed).

*thumbs up*
I had to use that trick when I was running RPM based distros years ago, but don't recall having to use it on Kubuntu or Neon.

[baldyeti]

I don't recall having to use it on Kubuntu or Neon.

I _think_ what happened is i did too thorough a cleanup job after removing budgie.
"apt autoremove" saw nothing left to do, yet deborphan suggested getting rid of an extra dozen packages

[GreyGeek]

Mmmmm. Deborphan
Never heard of it or don’t remember every hearing about it. Either way, I’m going to try it before I forget about it.

[GreyGeek]

Used deborphan and found this:

$ deborphan
libportaudiocpp0:amd64
libjpeg62:i386
libva-glx1:amd64
acpidump:all
kdeconnect-plasma:all
mesa-vdpau-drivers-lts-xenial:amd64
systemd-gui:all
libqt5scripttools5:amd64
libtag-extras1:amd64

and after removing dummy packages:

$ deborphan
libportaudiocpp0:amd64
libva-glx1:amd64
libqt5scripttools5:amd64
libtag-extras1:amd64

Those left over were not "dummy" packages nor were they packages without dependencies, so I left them.