Tray does not show up

[pmatos]

I have read #21. I am on archlinux running waybar 0.9.13 in sway 1.7.

~ export | grep XDG
XDG_CURRENT_DESKTOP=Unity
XDG_DATA_DIRS=/home/pmatos/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SESSION_CLASS=user
XDG_SESSION_DESKTOP=Unity
XDG_SESSION_ID=3
XDG_SESSION_TYPE=wayland
XDG_VTNR=1

My config is simple:

~ cat .config/waybar/config
{
    "layer": "top",
    "modules-left": ["sway/workspaces", "sway/mode"],
    "modules-center": ["sway/window"],
    "modules-right": ["battery", "clock", "tray"],
    "sway/window": {
        "max-length": 50
    },
    "battery": {
        "format": "{capacity}% {icon}",
        "format-icons": ["", "", "", "", ""]
    },
    "clock": {
        "format-alt": "{:%a, %d. %b  %H:%M}"
    },
    "tray": {
    	"icon-size": 21,
	"spacing": 10,
        "show-passive-items": true
    }
}

Even when attempting to trace, sway says nothing about the tray or any issue in rendering it:

~ waybar -l trace          
[2022-10-13 08:37:59.074] [info] Using configuration file /home/pmatos/.config/waybar/config
[2022-10-13 08:37:59.074] [info] Using CSS file /home/pmatos/.config/waybar/style.css
[2022-10-13 08:38:24.088] [debug] Output detection done: eDP-1 (Unknown 0x06B3 0x00000000)
[2022-10-13 08:38:24.089] [debug] Output detection done: DP-5 (Goldstar Company Ltd LG Ultra HD 0x000003E5)
[2022-10-13 08:38:24.089] [debug] Output detection done: DP-6 (Goldstar Company Ltd LG Ultra HD 0x00008617)
[2022-10-13 08:38:24.091] [warning] As using a timezone, some format args may be missing as the date library haven't got a release since 2018.
[2022-10-13 08:38:24.091] [warning] For a functional tray you must have libappindicator-* installed and export XDG_CURRENT_DESKTOP=Unity

** (waybar:16502): WARNING **: 08:38:24.121: gtk-layer-shell v0.7.0 may not work on GTK v3.24.34. If you experience crashes, check https://github.com/wmww/gtk-layer-shell/blob/master/compatibility.md
[2022-10-13 08:38:24.121] [debug] GTK widget tree:
window#waybar.background..DP-6.mode-default:dir(ltr)
  decoration:dir(ltr)
  box.horizontal:dir(ltr)
    box.horizontal.modules-left:dir(ltr)
      widget:dir(ltr)
        box#workspaces.horizontal:dir(ltr)
      widget:dir(ltr)
        label#mode:dir(ltr)
    box.horizontal.modules-center:dir(ltr)
      widget:dir(ltr)
        box.horizontal:dir(ltr)
          image:dir(ltr)
          label#window:dir(ltr)
    box.horizontal.modules-right:dir(ltr)
      widget:dir(ltr)
        label#battery:dir(ltr)
      widget:dir(ltr)
        label#clock:dir(ltr)
      widget:dir(ltr)
        box#tray.horizontal:dir(ltr)


(waybar:16502): GLib-GObject-WARNING **: 08:38:24.121: ../glib/gobject/gsignal.c:2088: type 'GtkWindow' is already overridden for signal id '73'

(waybar:16502): GLib-GObject-WARNING **: 08:38:24.121: ../glib/gobject/gsignal.c:2088: type 'GtkWindow' is already overridden for signal id '72'
[2022-10-13 08:38:24.123] [warning] As using a timezone, some format args may be missing as the date library haven't got a release since 2018.
[2022-10-13 08:38:24.123] [warning] For a functional tray you must have libappindicator-* installed and export XDG_CURRENT_DESKTOP=Unity
[2022-10-13 08:38:24.124] [debug] GTK widget tree:
window#waybar.background..DP-5.mode-default:dir(ltr)
  decoration:dir(ltr)
  box.horizontal:dir(ltr)
    box.horizontal.modules-left:dir(ltr)
      widget:dir(ltr)
        box#workspaces.horizontal:dir(ltr)
      widget:dir(ltr)
        label#mode:dir(ltr)
    box.horizontal.modules-center:dir(ltr)
      widget:dir(ltr)
        box.horizontal:dir(ltr)
          image:dir(ltr)
          label#window:dir(ltr)
    box.horizontal.modules-right:dir(ltr)
      widget:dir(ltr)
        label#battery:dir(ltr)
      widget:dir(ltr)
        label#clock:dir(ltr)
      widget:dir(ltr)
        box#tray.horizontal:dir(ltr)


(waybar:16502): GLib-GObject-WARNING **: 08:38:24.124: ../glib/gobject/gsignal.c:2088: type 'GtkWindow' is already overridden for signal id '73'

(waybar:16502): GLib-GObject-WARNING **: 08:38:24.124: ../glib/gobject/gsignal.c:2088: type 'GtkWindow' is already overridden for signal id '72'
[2022-10-13 08:38:24.126] [warning] As using a timezone, some format args may be missing as the date library haven't got a release since 2018.
[2022-10-13 08:38:24.126] [warning] For a functional tray you must have libappindicator-* installed and export XDG_CURRENT_DESKTOP=Unity
[2022-10-13 08:38:24.126] [debug] GTK widget tree:
window#waybar.background.eDP-1..mode-default:dir(ltr)
  decoration:dir(ltr)
  box.horizontal:dir(ltr)
    box.horizontal.modules-left:dir(ltr)
      widget:dir(ltr)
        box#workspaces.horizontal:dir(ltr)
      widget:dir(ltr)
        label#mode:dir(ltr)
    box.horizontal.modules-center:dir(ltr)
      widget:dir(ltr)
        box.horizontal:dir(ltr)
          image:dir(ltr)
          label#window:dir(ltr)
    box.horizontal.modules-right:dir(ltr)
      widget:dir(ltr)
        label#battery:dir(ltr)
      widget:dir(ltr)
        label#clock:dir(ltr)
      widget:dir(ltr)
        box#tray.horizontal:dir(ltr)

[2022-10-13 08:38:24.142] [info] Bar configured (width: 2560, height: 24) for output: DP-6
[2022-10-13 08:38:24.142] [info] Bar configured (width: 1440, height: 24) for output: DP-5
[2022-10-13 08:38:24.142] [info] Bar configured (width: 1920, height: 24) for output: eDP-1
[2022-10-13 08:38:24.143] [info] Bar configured (width: 2560, height: 24) for output: DP-6
[2022-10-13 08:38:24.143] [info] Bar configured (width: 1440, height: 24) for output: DP-5

I would expect that if it's not rendered, then at least an error would show but I see nothing.

Any ideas on how I can bettter understand what's going on?

[pmatos]

Interestingly things started working for no good reason. Maybe I started a necessary service or installed a required package. In any case, it is now showing up.