Bug#1029352: netcfg: broken ifupdown support for ethernet interface
Similar Trouble here:
A smoothly running Debian-Bookworm system here with ethernet eno1 managed by ifupdown, wlp1s0 is managed by NetworkManager.
After today's bigger Update consisting of:
qttranslations5-l10n:amd64 (5.15.7-2, 5.15.8-2), qtbase5-dev-tools:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5quickcontrols2-5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtquick-shapes:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtquick-layouts:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5core5a:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtquick-window2:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qt5-gtk-platformtheme:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), solaar:amd64 (1.1.8+dfsg-1, 1.1.8+dfsg-2), qml-module-qt-labs-settings:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), python3-pyqt5.qtopengl:amd64 (5.15.7+dfsg-3+b1, 5.15.7+dfsg-3+b3), libqt5charts5:amd64 (5.15.7-2, 5.15.8-2), libqt5qml5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), pyqt5-dev-tools:amd64 (5.15.7+dfsg-3+b1, 5.15.7+dfsg-3+b3), libqt5x11extras5:amd64 (5.15.7-2, 5.15.8-2), libmediastreamer12:amd64 (1:5.1.64+dfsg-3+b2, 1:5.1.64+dfsg-3+b3), qml-module-qtquick-controls2:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5quickshapes5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qt-labs-platform:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5network5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtquick-localstorage:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5dbus5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5multimedia5-plugins:amd64 (5.15.7-2, 5.15.8-2), python3-pyqt5:amd64 (5.15.7+dfsg-3+b1, 5.15.7+dfsg-3+b3), libqt5quick5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5test5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qtwayland5:amd64 (5.15.7-2, 5.15.8-2), libqt5waylandcompositor5:amd64 (5.15.7-2, 5.15.8-2), libqt5widgets5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), python3-scipy:amd64 (1.8.1-20, 1.8.1-21), qml-module-qtcharts:amd64 (5.15.7-2, 5.15.8-2), libqt5gui5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5multimediagsttools5:amd64 (5.15.7-2, 5.15.8-2), python3-jsonschema:amd64 (4.9.1-3, 4.10.3-1), libqt5multimedia5:amd64 (5.15.7-2, 5.15.8-2), libqt5printsupport5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), ifupdown:amd64 (0.8.39+b1, 0.8.40), libqt5xml5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5opengl5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), linphone-desktop:amd64 (4.4.10-2+b1, 4.4.10-2+b2), libqt5texttospeech5:amd64 (5.15.7-2, 5.15.8-2), xfonts-encodings:amd64 (1:1.0.4-2.1, 1:1.0.4-2.2), libqt5sql5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtgraphicaleffects:amd64 (5.15.7-2, 5.15.8-2), qml-module-qt-labs-folderlistmodel:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5svg5:amd64 (5.15.7-2, 5.15.8-2), libqt5multimediawidgets5:amd64 (5.15.7-2, 5.15.8-2), libqt5quicktemplates2-5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtqml-models2:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtquick-privatewidgets:amd64 (5.15.7-2, 5.15.8-2), qtspeech5-speechd-plugin:amd64 (5.15.7-2, 5.15.8-2), qml-module-qtquick-controls:amd64 (5.15.7-2, 5.15.8-2), qml-module-qtquick-templates2:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5sql5-sqlite:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), libqt5qmlmodels5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), xfonts-scalable:amd64 (1:1.0.3-1.2, 1:1.0.3-1.3), xfce4-screenshooter:amd64 (1.10.2-1, 1.10.3-1), libqt5designer5:amd64 (5.15.7-2, 5.15.8-2), qml-module-qtquick2:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qml-module-qtquick-dialogs:amd64 (5.15.7-2, 5.15.8-2), libqt5qmlworkerscript5:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), python3-dbus.mainloop.pyqt5:amd64 (5.15.7+dfsg-3+b1, 5.15.7+dfsg-3+b3), libqt5waylandclient5:amd64 (5.15.7-2, 5.15.8-2), libqt5help5:amd64 (5.15.7-2, 5.15.8-2), qml-module-qtqml:amd64 (5.15.7+dfsg-2, 5.15.8+dfsg-2), qt5-gtk2-platformtheme:amd64 (5.0.0+git23.g335dbec-4+b6, 5.0.0+git23.g335dbec-4+b7)
and subsequent reboot I did not get any network connection.
systemctl restart networking
brought my ethernet interface up again and all was fine.
Applying Cyril's trick to substitute "allow-hotplug" by "auto" in /etc/network/interfaces resolved it for the moment.
Reply to: