From f9ec178d313fb5095d4d7bbffb9776d68b0b64e9 Mon Sep 17 00:00:00 2001
From: Bobby Rong <rjl931189261@126.com>
Date: Wed, 14 Jan 2026 23:39:13 +0800
Subject: [PATCH] nixos/pantheon: Start io.elementary.settings-daemon

To test this, change your wallpaper and see if the change is reflected in
greeter as well (the daemon syncs the wallpaper to /var/lib/AccountsService/users/$USER).
---
 .../services/desktop-managers/pantheon.nix       | 16 ++++++++++++++++
 nixos/tests/pantheon.nix                         |  6 ++++++
 2 files changed, 22 insertions(+)

diff --git a/nixos/modules/services/desktop-managers/pantheon.nix b/nixos/modules/services/desktop-managers/pantheon.nix
index 974ad1a1be41..7f7cd2593393 100644
--- a/nixos/modules/services/desktop-managers/pantheon.nix
+++ b/nixos/modules/services/desktop-managers/pantheon.nix
@@ -208,6 +208,22 @@ in
         "org.gnome.SettingsDaemon.XSettings.service"
       ];
 
+      # https://github.com/elementary/settings-daemon/issues/217
+      systemd.user.services.elementary-settings-daemon = {
+        description = "elementary Settings Daemon";
+        wantedBy = [ "gnome-session-initialized.target" ];
+        after = [ "gnome-session-initialized.target" ];
+
+        # The daemon might launch external applications via g_app_info_launch.
+        environment.PATH = lib.mkForce null;
+
+        serviceConfig = {
+          Slice = "session.slice";
+          ExecStart = "${pkgs.pantheon.elementary-settings-daemon}/bin/io.elementary.settings-daemon";
+          Restart = "on-failure";
+        };
+      };
+
       # Global environment
       environment.systemPackages =
         (with pkgs.pantheon; [
diff --git a/nixos/tests/pantheon.nix b/nixos/tests/pantheon.nix
index 5ba36442274b..0b6b88c17e7f 100644
--- a/nixos/tests/pantheon.nix
+++ b/nixos/tests/pantheon.nix
@@ -85,6 +85,7 @@
               # https://github.com/elementary/gala/pull/2140
               "${pkgs.pantheon.gnome-settings-daemon}/libexec/gsd-xsettings",
               "${pkgs.pantheon.pantheon-agent-polkit}/libexec/policykit-1-pantheon/io.elementary.desktop.agent-polkit",
+              "${pkgs.pantheon.elementary-settings-daemon}/bin/io.elementary.settings-daemon",
               "${pkgs.pantheon.elementary-files}/libexec/io.elementary.files.xdg-desktop-portal"
           ]
           for i in pgrep_list:
@@ -101,6 +102,11 @@
           # Hopefully from gcr-ssh-agent.
           machine.succeed(f"{cmd} | grep 'SSH_AUTH_SOCK' | grep 'gcr'")
 
+      with subtest("Ensure custom keyboard shortcuts can launch external apps via settings-daemon"):
+          cmd = "xargs --null --max-args=1 echo < /proc/$(pgrep -xf ${pkgs.pantheon.elementary-settings-daemon}/bin/io.elementary.settings-daemon)/environ"
+          machine.succeed(f"{cmd} | grep '^PATH=' | grep '/run/current-system/sw/bin'")
+          machine.succeed(f"{cmd} | grep '^XDG_DATA_DIRS=' | grep '/run/current-system/sw/share'")
+
       with subtest("Wait for elementary videos autostart"):
           machine.wait_until_succeeds("pgrep -xf /run/current-system/sw/bin/io.elementary.videos")
           machine.wait_for_text("No Videos Open")