Hi, Nice I found some similar cases to your one.
But I have even more strange cases like: $ systemctl list-units --all "alsa*" UNIT LOAD ACTIVE SUB DESCRIPTION ● alsa-restore.service not-found inactive dead alsa-restore.service ● alsa-state.service not-found inactive dead alsa-state.service Legend: LOAD → Reflects whether the unit definition was properly loaded. ACTIVE → The high-level unit activation state, i.e. generalization of SUB. SUB → The low-level unit activation state, values depend on unit type. 2 loaded units listed. To show all installed unit files use 'systemctl list-unit-files'. $ find /etc/systemd /usr/lib/systemd $HOME/.config/systemd -name "alsa*" (nothing) $ apt-file search --regex '/alsa-.*\.service' alsa-utils: /lib/systemd/system/alsa-restore.service alsa-utils: /lib/systemd/system/alsa-state.service alsa-utils: /lib/systemd/system/alsa-utils.service alsa-utils: /lib/systemd/system/sound.target.wants/alsa-restore.service alsa-utils: /lib/systemd/system/sound.target.wants/alsa-state.service alsa-utils: /usr/lib/systemd/system/alsa-restore.service alsa-utils: /usr/lib/systemd/system/alsa-state.service alsa-utils: /usr/lib/systemd/system/alsa-utils.service alsa-utils: /usr/lib/systemd/system/sound.target.wants/alsa-restore.service alsa-utils: /usr/lib/systemd/system/sound.target.wants/alsa-state.service $ LANG=C dpkg-query -s alsa-utils dpkg-query: package 'alsa-utils' is not installed and no information is available Use dpkg --info (= dpkg-deb --info) to examine archive files. This package was installed but removed days ago (many reboots since then). Thanks, Patrice ps: on my side, everything started with hacking the following: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1053245#20 where it is like a "ghost" service: $ dpkg-query -s fluidsynth Package: fluidsynth Status: install ok installed Priority: optional Section: sound Installed-Size: 112 Maintainer: Debian Multimedia Maintainers <debian-multime...@lists.debian.org> Architecture: amd64 Source: fluidsynth (2.3.4-1) Version: 2.3.4-1+b3 Replaces: iiwusynth Provides: iiwusynth Depends: init-system-helpers (>= 1.52), libc6 (>= 2.34), libfluidsynth3 (>= 2.2.0), libglib2.0-0t64 (>= 2.12.0), libpipewire-0.3-0t64 (>= 0.3.6), libsdl2- 2.0-0 (>= 2.0.12), libsystemd0 Recommends: qsynth Conflicts: iiwusynth Conffiles: /etc/default/fluidsynth 4c778b27917c9dfdd8b0396841d6a390 Description: Real-time MIDI software synthesizer Fluidsynth is a real-time midi synthesizer based on the soundfont (sf2 and sf3) specifications. It can be used to render MIDI input or MIDI files to audio. The MIDI events are read from a MIDI device. The sound is rendered in real-time to the sound output device. Homepage: https://github.com/Fluidsynth/fluidsynth $ systemctl list-units --all "fluid*" UNIT LOAD ACTIVE SUB DESCRIPTION 0 loaded units listed. To show all installed unit files use 'systemctl list-unit-files'. $ find /etc/systemd /usr/lib/systemd $HOME/.config/systemd -name "fluid*" /etc/systemd/user/default.target.wants/fluidsynth.service /usr/lib/systemd/user/fluidsynth.service but the service is started at least once during the session logging. Bizarre...