Hello Jorge!

Am 10.01.22 um 13:43 schrieb Jorge Gustavo Rocha:
> It seems to happens when some QGIS tool runs.
> My wild guess is to check if you are not running QGIS against some old
> PROJ or GDAL version. Check if you have some dangling PROJ or GDAL libs
> around.
Found an issue from 2020 about it
https://github.com/qgis/QGIS/issues/35649

and your guess seems the correct direction, but I cannot solve by
starting fresh with

apt remove libgdal29 libgdal30
cat<< EOF> /etc/apt/sources.list.d/qgis-ubuntugis-unstable.list
deb https://qgis.org/ubuntugis $(lsb_release -s -c) main
deb-src https://qgis.org/ubuntugis $(lsb_release -s -c) main
EOF

# lsb_release -s -c # focal

yielding

root@box:/etc/apt# rgrep qgis *
sources.list.d/qgis-ubuntugis-unstable.list:deb
https://qgis.org/ubuntugis focal main
sources.list.d/qgis-ubuntugis-unstable.list:deb-src
https://qgis.org/ubuntugis focal main
Binary file trusted.gpg matches
Binary file trusted.gpg.d/qgis-archive.gpg matches


there are dependencies to both lbgdal29 and libgdal30 from qgis

> apt install qgis
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> The following additional packages will be installed:
>   gdal-bin grass-core libgdal29 libgdal30 libpdal-base12
libpdal-plugin-e57 libpdal-plugin-faux libpdal-plugin-hdf libpdal-plugin-i3s
>   libpdal-plugin-icebridge libpdal-plugin-pgpointcloud libpdal-plugins
libqgis-3d3.22.2 libqgis-analysis3.22.2 libqgis-app3.22.2 libqgis-core3.22.2
>   libqgis-customwidgets libqgis-gui3.22.2 libqgis-server3.22.2
libqgisgrass7-3.22.2 libqgispython3.22.2 python3-gdal python3-qgis
python3-qgis-common
>   qgis-plugin-grass qgis-provider-grass qgis-providers
> Suggested packages:
>   libgdal-grass grass-dev grass-gui e00compr avce00 gnuplot gpsbabel
gpstrans python3-rpy2 python3-termcolor otb-qgis saga
> The following NEW packages will be installed:
>   gdal-bin grass-core libgdal29 libgdal30 libpdal-base12
libpdal-plugin-e57 libpdal-plugin-faux libpdal-plugin-hdf libpdal-plugin-i3s
>   libpdal-plugin-icebridge libpdal-plugin-pgpointcloud libpdal-plugins
libqgis-3d3.22.2 libqgis-analysis3.22.2 libqgis-app3.22.2 libqgis-core3.22.2
>   libqgis-customwidgets libqgis-gui3.22.2 libqgis-server3.22.2
libqgisgrass7-3.22.2 libqgispython3.22.2 python3-gdal python3-qgis
python3-qgis-common
>   qgis qgis-plugin-grass qgis-provider-grass qgis-providers

I guess because of rdepends of python3-gdal

> apt show python3-gdal
> Version: 3.4.0+dfsg-1~focal0
> Maintainer: Debian GIS Project <pkg-grass-de...@lists.alioth.debian.org>
> Depends: python3 (<< 3.9), python3 (>= 3.8~), python3-numpy (>=
1:1.16.0~rc1), python3-numpy-abi9, python3:any, libc6 (>= 2.14),
libgcc-s1 (>= 3.0), libgdal30 (>= 3.4.0), libstdc++6 (>= 5.2)
which is also from unstable ubuntugis:

> apt-cache policy python3-gdal
> python3-gdal:
>   Installed: (none)
>   Candidate: 3.4.0+dfsg-1~focal0
>   Version table:
>      3.4.0+dfsg-1~focal0 500
>         500
http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu focal/main
amd64 Packages

So I will try to switch to ltr for now, but this seems to be a
dependency problem in the repo.

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