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xfce4-notifyd crashes and fails to restart on Wayland (Labwc) with "cannot open display: :500" error despite active dbus-broker

Issue Description

xfce4-notifyd crashes and it doesn't restart on wayland, labwc with error: xfce4-notifyd[231816]: cannot open display: :500

Additional Information

journalctl crash log: xfce4-notifyd.log

I have dbus-broker

mb@thought ~ $ systemctl --user status dbus-broker.service
● dbus-broker.service - D-Bus User Message Bus
     Loaded: loaded (/usr/lib/systemd/user/dbus-broker.service; disabled; preset: enabled)
     Active: active (running) since Thu 2025-11-13 02:13:07 -03; 14h ago
 Invocation: 816f84f6dd9540479ad240f40cc76a83
TriggeredBy: ● dbus.socket
       Docs: man:dbus-broker-launch(1)
   Main PID: 1247 (dbus-broker-lau)
      Tasks: 2 (limit: 37035)
     Memory: 2.5M (peak: 5.3M)
        CPU: 894ms
     CGroup: /user.slice/user-1000.slice/user@1000.service/session.slice/dbus-broker.service
             ├─1247 /usr/bin/dbus-broker-launch --scope user
             └─1248 dbus-broker --log 11 --controller 10 --machine-id 97ee57e049fd4aba92f75dc8dedc6162 --max-bytes 100000000000000 --max-fds 25000000000000 --max-matches 5000000000

nov 13 02:13:07 thought dbus-broker-launch[1247]: Policy to allow eavesdropping in /usr/share/dbus-1/session.conf +33: Eavesdropping is deprecated and ignored
nov 13 02:13:07 thought systemd[1233]: Starting D-Bus User Message Bus...
nov 13 02:13:07 thought dbus-broker-launch[1247]: Service file '/usr/share/dbus-1/services/org.xfce.Thunar.FileManager1.service' is not named after the D-Bus name 'org.freedesktop.FileManager1'.
nov 13 02:13:07 thought dbus-broker-launch[1247]: Service file '/usr/share/dbus-1/services/org.xfce.Tumbler.Cache1.service' is not named after the D-Bus name 'org.freedesktop.thumbnails.Cache1'.
nov 13 02:13:07 thought dbus-broker-launch[1247]: Service file '/usr/share/dbus-1/services/org.xfce.Tumbler.Manager1.service' is not named after the D-Bus name 'org.freedesktop.thumbnails.Manager1'.
nov 13 02:13:07 thought dbus-broker-launch[1247]: Service file '/usr/share/dbus-1/services/org.xfce.Tumbler.Thumbnailer1.service' is not named after the D-Bus name 'org.freedesktop.thumbnails.Thumbnailer1'.
nov 13 02:13:07 thought dbus-broker-launch[1247]: Service file '/usr/share/dbus-1/services/org.xfce.xfce4-notifyd.Notifications.service' is not named after the D-Bus name 'org.freedesktop.Notifications'.
nov 13 02:13:07 thought dbus-broker-launch[1247]: Service file '/usr/share/dbus-1/services/org.xfce.xfce4-notifyd.Notifyd.service' is not named after the D-Bus name 'org.xfce.Notifyd'.
nov 13 02:13:07 thought systemd[1233]: Started D-Bus User Message Bus.
nov 13 02:13:07 thought dbus-broker-launch[1247]: Ready
mb@thought ~ $ echo $DBUS_SESSION_BUS_ADDRESS
unix:path=/run/user/1000/bus

Versions

Archlinux, Wayland/labwc

  • xfce4-notifyd 0.9.7-2
  • labwc-git 0.9.2.r52.g9f417895-1
  • glycin 2.0.7-1