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xfce4-panel: no icon in tasklist #461224

@bobby285271

Description

@bobby285271

Nixpkgs version

  • Unstable (25.11)

Describe the bug

After the staging-next 2025-11-02 merge (which contains a GNOME 49 bump), the tasklist plugin in xfce4-panel no longer shows icons for me in Xfce X11 session.

Image

xfce4-panel -q; xfce4-panel shows these warnings but I believe xfce4-panel is already wrapped.

(xfce4-panel:9713): Gtk-WARNING **: 20:22:06.850: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.

Steps to reproduce

Start the following VM on 1b0090a, login with test/test:

{
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/1b0090a49387aa976b25877614820644b68df07a";
  outputs = inputs@{ self, nixpkgs }: {
    nixosConfigurations.vm = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        ({ pkgs, ... }: {
          imports = [ "${inputs.nixpkgs}/nixos/modules/virtualisation/qemu-vm.nix" ];
          services.xserver = {
            enable = true;
            desktopManager.xfce.enable = true;
          };
          users.users.test = {
            isNormalUser = true;
            uid = 1000;
            extraGroups = [ "wheel" "networkmanager" ];
            password = "test";
          };
          virtualisation = {
            qemu.options = [ "-device intel-hda -device hda-duplex" ];
            memorySize = 2048;
            diskSize = 8192;
          };
          system.stateVersion = "25.05";
        })
      ];
    };
    packages.x86_64-linux.default = self.nixosConfigurations.vm.config.system.build.vm;
    apps.x86_64-linux.default = {
      type = "app";
      program = "${self.packages.x86_64-linux.default}/bin/run-nixos-vm";
    };
  };
}

Expected behaviour

See screenshots below.

Screenshots

Expected:

Image

System metadata

Nixpkgs 1b0090a.

Notify maintainers

@NixOS/xfce


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