[Bug] Flatpak app startup error: Failed to connect to socket /run/dbus/system_bus_socket

[alberto-schena-gizero]

What did I do

I ran flatpak updated com.emqx.MQTTX application.

What happened

The application window did not appear.
Running with flatpak run com.emqx.MQTTX I was able to see the cause.

Expected

The application to start.

Environment

• OS: Linux Debian Trixie (tried both with Gnome and KDE: same result)
• MQTTX version: 1.13.0, installed via flatpak

More detail

The error is about missing file /run/dbus/system_bus_socket.
Finally there is a segmentation fault regarding zypak-wrapper /app/mqttx/mqttx.

Here's the error log:

[3:0129/124237.244483:ERROR:dbus/bus.cc:408] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: File o directory non esistente
[Database] Using data path: /home/alberto/.var/app/com.emqx.MQTTX/config/MQTTX
[PATH] System PATH environment variable has been fixed
[ENV] Node.js version: 22.21.1
[ENV] Electron version: 39.2.7
[ENV] Chrome version: 142.0.7444.235
[3:0129/124238.044274:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: File o directory non esistente (2)
[3:0129/124238.044316:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:282] Failed to initialize Wayland platform
[3:0129/124238.044358:ERROR:ui/aura/env.cc:257] The platform failed to initialize.  Exiting.
/app/bin/mqttx.sh: riga 2:     3 Errore di segmentazione zypak-wrapper /app/mqttx/mqttx

[nalcabio-tom]

Same. flatpak run --filesystem=/run/dbus --socket=wayland com.emqx.MQTTX worked for me.

[nnrudakov]

The same on snap

[PATH] System PATH environment variable has been fixed
[ENV] Node.js version: 22.21.1
[ENV] Electron version: 39.2.7
[ENV] Chrome version: 142.0.7444.235
[1063268:0203/151240.518912:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)
[1063268:0203/151240.518945:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:282] Failed to initialize Wayland platform
[1063268:0203/151240.518969:ERROR:ui/aura/env.cc:257] The platform failed to initialize.  Exiting.
Segmentation fault (core dumped)

[luckv]

Same for fedora 43 with KDE, with MQTTX 1.13.0

Works with @nalcabio-tom solution, but I have to keep a terminal window running.

Same. flatpak run --filesystem=/run/dbus --socket=wayland com.emqx.MQTTX worked for me.

user@fedora:~$ flatpak run com.emqx.MQTTX
[3:0211/105715.521162:ERROR:dbus/bus.cc:408] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory
[Database] Using data path: /home/user/.var/app/com.emqx.MQTTX/config/MQTTX
[PATH] System PATH environment variable has been fixed
[ENV] Node.js version: 22.21.1
[ENV] Electron version: 39.2.7
[ENV] Chrome version: 142.0.7444.235
[3:0211/105716.258634:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)
[3:0211/105716.258648:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:282] Failed to initialize Wayland platform
[3:0211/105716.258661:ERROR:ui/aura/env.cc:257] The platform failed to initialize.  Exiting.