Only root can send notification

Question

I'm aware of the two other posts describing the same problem, however none of the solutions proposed there have worked for me.

I'm running Ubuntu 22.04.3 LTS and using GNOME 42.9 as my Desktop environment.

Description of the issue

My main issue is that using notify-send as a regular user results in the following error message:

robin@robin-workstation:~$ notify-send "test"
Error calling StartServiceByName for org.freedesktop.Notifications: Process org.freedesktop.Notifications received signal 11

There seem to be no process running related to notification, which is the reason why the error message mentions "StartServiceByName", it's probably trying to start the service since this is the first time it's needed. However starting the service seems to fail with a segfault (signal 11 = segfault, if I'm googling right).

When trying to start the notification-daemon myself I indeed get a Segmentation Fault:

robin@robin-workstation:~$ /usr/lib/notification-daemon/notification-daemon
Segmentation fault

When trying to run the same program as root using sudo, it simply hangs in my terminal. Interestingly, when I look at running programs while it hangs, I do see it in the list of running programs, but attempting to notify-send still fails with the same error message...

robin@robin-workstation:~$ ps aux | grep notification
robin       2262  0.0  0.0 250308 11892 ?        Ssl  14:42   0:00 /usr/libexec/gsd-print-notifications
root        7254  0.2  0.0  14268  5700 pts/0    S+   15:27   0:00 sudo /usr/lib/notification-daemon/notification-daemon
root        7255  2.4  0.1 263632 22144 pts/0    Sl+  15:27   0:00 /usr/lib/notification-daemon/notification-daemon
robin       7268  0.0  0.0   9216  2276 pts/2    S+   15:27   0:00 grep --color=auto notification
robin@robin-workstation:~$ notify-send "test"
Error calling StartServiceByName for org.freedesktop.Notifications: Process org.freedesktop.Notifications received signal 11

Additional info

I'm not using notify-osd (it is not installed on my machine). libnotify-bin and notification-daemon are installed and at the latest version:

robin@robin-workstation:~$ sudo apt install notification-daemon
notification-daemon is already the newest version (3.20.0-4build1).

robin@robin-workstation:~$ sudo apt install libnotify-bin
libnotify-bin is already the newest version (0.7.9-3ubuntu5.22.04.1).

The content of the notifications .service file seem legit (which makes sense, the problem doesn't seem that the system can't find the service, but that it can't start it because it segfault):

robin@robin-workstation:~$ cat /usr/share/dbus-1/services/org.freedesktop.Notifications.service
[D-BUS Service]
Name=org.freedesktop.Notifications
Exec=/usr/lib/notification-daemon/notification-daemon

I've tried reinstalling notification-daemon and libnotify-bin, without effect.

Any ideas worth investigating would be appreciated! Thanks!

As requested here's my env:

SHELL=/bin/bash
SESSION_MANAGER=local/robin-workstation:@/tmp/.ICE-unix/2119,unix/robin-workstation:/tmp/.ICE-unix/2119
QT_ACCESSIBILITY=1
COLORTERM=truecolor
XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg
SSH_AGENT_LAUNCHER=gnome-keyring
XDG_MENU_PREFIX=gnome-
GNOME_DESKTOP_SESSION_ID=this-is-deprecated
LANGUAGE=en_GB:en
LC_ADDRESS=fr_FR.UTF-8
GNOME_SHELL_SESSION_MODE=ubuntu
LC_NAME=fr_FR.UTF-8
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
XMODIFIERS=@im=ibus
DESKTOP_SESSION=ubuntu
LC_MONETARY=fr_FR.UTF-8
GTK_MODULES=gail:atk-bridge
PWD=/home/robin
LOGNAME=robin
XDG_SESSION_DESKTOP=ubuntu
XDG_SESSION_TYPE=wayland
SYSTEMD_EXEC_PID=2308
XAUTHORITY=/run/user/1000/.mutter-Xwaylandauth.3SZDE2
HOME=/home/robin
USERNAME=robin
IM_CONFIG_PHASE=1
LC_PAPER=fr_FR.UTF-8
LANG=en_GB.UTF-8
LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00[...]
XDG_CURRENT_DESKTOP=ubuntu:GNOME
VTE_VERSION=6800
WAYLAND_DISPLAY=wayland-0
GNOME_TERMINAL_SCREEN=/org/gnome/Terminal/screen/5df7e24d_8b5c_40c5_a6a3_3c74bdc3c336
GNOME_SETUP_DISPLAY=:1
LESSCLOSE=/usr/bin/lesspipe %s %s
XDG_SESSION_CLASS=user
TERM=xterm-256color
LC_IDENTIFICATION=fr_FR.UTF-8
LESSOPEN=| /usr/bin/lesspipe %s
USER=robin
GNOME_TERMINAL_SERVICE=:1.104
DISPLAY=:0
SHLVL=1
LC_TELEPHONE=fr_FR.UTF-8
QT_IM_MODULE=ibus
LC_MEASUREMENT=fr_FR.UTF-8
PAPERSIZE=a4
XDG_RUNTIME_DIR=/run/user/1000
LC_TIME=fr_FR.UTF-8
XDG_DATA_DIRS=/usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
PATH=/home/robin/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin
GDMSESSION=ubuntu
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
LC_NUMERIC=fr_FR.UTF-8
_=/usr/bin/env
OLDPWD=/home/robin