[BUG] Error running dbus command from a published mqtt packet

[eljefe80]

Go Hass Agent Version
Go Hass Agent: v13.2.7

Describe the bug
A specific mqtt.publish dbus command as described in [https://github.com/joshuar/go-hass-agent?tab=readme-ov-file#custom-d-bus-controls] fails to work

To Reproduce
Steps to reproduce the behavior:

1. Install go-hass-agent and configure home-assistant and mqtt
2. perform an mqtt publish through the home-assistant MQTT "Publish a Packet" interface using the following payload:

{
  "bus": "session",
  "path": "/org/gnome/Mutter/DisplayConfig",
  "method": "org.freedesktop.DBus.Properties.Set",
  "destination": "org.gnome.Mutter.DisplayConfig",
  "args": [
      "org.gnome.Mutter.DisplayConfig",
      "PowerSaveMode",
      "0"
  ],
  "use_session_path": false
}

4. See failed dbus command in the agent logs.

Expected behavior
I expect to see the dbus command succeed in the agent logs.

Logs

go-hass-agent.log

Desktop (please complete the following information):

• OS: Linux
• Armbian
• 25.5.1

Additional context

The analogous dbus-send --print-reply --dest=org.gnome.Mutter.DisplayConfig /org/gnome/Mutter/DisplayConfig org.freedesktop.DBus.Properties.Set string:org.gnome.Mutter.DisplayConfig string:PowerSaveMode variant:int32:0 works fine.

From what I can tell, the error returned by dbus is similar to the one received when improperly formatted args are passed to dbus-send. However, I've tried various permutations of prepending the values in the packet with "string:" and "variant:int32" to no avail.

[joshuar]

Hey there thanks for trying out Go Hass Agent and reporting this issue!

Hmm, that's a tricky one. Is this using the Gnome desktop? I'll have to spin up a VM and try to reproduce as I'm unsure from the logs and looking back through the code what could be failing here. Sometimes D-Bus can be a bit "particular" about the values of each parameter as you've been trying to test as well.

Hold tight and I'll see what I can troubleshoot!

[eljefe80]

Yeah, it's Armbian, which is a bog-standard Debian, with an arm-based kernel. It is using Gnome desktop.

Thanks for taking a look at this!