diff --git a/features/monitor-brightness.nix b/features/monitor-brightness.nix
index 22269f9..aa24eef 100644
--- a/features/monitor-brightness.nix
+++ b/features/monitor-brightness.nix
@@ -3,6 +3,10 @@
   boot.kernelModules = [ "i2c-dev" ];
 
   environment.systemPackages = with pkgs; [
+    # ddcutil can manage *external* monitor's brightness
     ddcutil
+
+    # This can control the laptop display.
+    xorg.xbacklight
   ];
 }
diff --git a/home.nix b/home.nix
index a04b03a..9ccc3fb 100644
--- a/home.nix
+++ b/home.nix
@@ -115,6 +115,9 @@ in
         t = "tig";
         l = "ls --color=always";
         h = "${himalaya}/bin/himalaya";
+        em = "TERM=xterm-direct emacs -nw";
+      };
+      sessionVariables = {
       };
     };
 
diff --git a/hosts/x1c7.nix b/hosts/x1c7.nix
index 8bd03cd..e0bfacd 100644
--- a/hosts/x1c7.nix
+++ b/hosts/x1c7.nix
@@ -55,7 +55,7 @@
 
   services.xserver.enable = true;
   #services.xserver.displayManager.gdm.enable = true;
-  #services.xserver.desktopManager.gnome3.enable = true;
+  services.xserver.desktopManager.gnome3.enable = true;
 
   users.users.srid = {
     isNormalUser = true;