Backlight/slider is not working.

[niksingh710]

backlight module works to increase and decrease brightness of laptop on scrolling on it.
and it also updates backlight/slider value.
but when changing the slider of backlight/slider it does not change the brightness.

** (waybar:204117): CRITICAL **: 23:26:22.966:
unhandled exception (type Glib::Error) in signal handler:
domain: g-dbus-error-quark
code  : 41
what  : GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Unknown object '/org/freedesktop/login1/session/self'.


** (waybar:204117): CRITICAL **: 23:26:22.979:
unhandled exception (type Glib::Error) in signal handler:
domain: g-dbus-error-quark
code  : 41
what  : GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Unknown object '/org/freedesktop/login1/session/self'.


** (waybar:204117): CRITICAL **: 23:26:22.993:
unhandled exception (type Glib::Error) in signal handler:
domain: g-dbus-error-quark
code  : 41
what  : GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Unknown object '/org/freedesktop/login1/session/self'.


** (waybar:204117): CRITICAL **: 23:26:23.178:
unhandled exception (type Glib::Error) in signal handler:
domain: g-dbus-error-quark
code  : 41
what  : GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Unknown object '/org/freedesktop/login1/session/self'.

[apiraino]

Can you post a minimal configuration to reproduce the issue? Also please the Waybar version and more info about platform where you're running Waybar.

I've tested what is suggested on the wiki and it seems to work (Waybar v0.9.24)

[niksingh710]

Can you post a minimal configuration to reproduce the issue? Also please the Waybar version and more info about platform where you're running Waybar.

I've tested what is suggested on the wiki and it seems to work (Waybar v0.9.24)

I am using arch linux.
It seems to be introduced in the 0.10 release fixed in the -git branch.

[nicklayb]

Experiencing the same thing on NixOS with Waybar 0.11.0, here's my config. It seems it was working pretty recently. I updated to NixOS 24.11 recently, that might be related to it. Error message is identical

{
	"layer": "top",
	"modules-left": ["image#logo", "hyprland/submap", "hyprland/window"],
	"modules-center": ["hyprland/workspaces"],
	"modules-right": ["backlight/slider", "network", "pulseaudio", "cpu", "memory", "battery", "clock"],
	"image#logo": {
		"path": "/home/nboisvert/.config/waybar/nixos.svg",
		"size": 20,
		"on-double-click": "xdg-open https://search.nixos.org/packages"
	},
	"pulseaudio": {
		"tooltip": false,
		"scroll-step": 0.3,
		"format": "{icon} {volume}%",
		"format-icons": {
			"default": [" ", " ", " "]
		},
		"on-double-click": "pavucontrol"
	},
	"network": {
		"tooltip": false,
		"format-wifi": "  {essid} | {ipaddr}",
		"format-ethernet": "  {ipaddr}"
	},
	"cpu": {
		"tooltip": false,
		"format": " {}%"
	},
	"memory": {
		"tooltip": false,
		"format": " {}%"
	},
	"backlight/slider": {
		"min": 15
	},
	"battery": {
	  "format": "{icon} {capacity}%",
	  "format-icons": ["", "", "", " ", ""],
		"states": {
                        "warning": 25, 
                        "critical": 10
		}
	}
}