fix(nixos): Don't configure monitors on laptop

home-manager/modules/gnome/default.nix

@@ -1,8 +1,7 @@
-{ isLinux, pkgs, ... }:
+{ isLinux, isThinkpad, lib, pkgs, ... }:
 if isLinux then {
   imports = [ ./dconf.nix ];
   xdg.configFile = {
-    "monitors.xml".source = ../../../conf.d/gnome-monitors.xml;
     # workaround for https://github.com/nix-community/home-manager/issues/3447
     # autostart 1Password in the background so I can use the SSH agent without manually opening the app first
     "autostart/1password.desktop".text = ''
@@ -30,6 +29,9 @@ if isLinux then {
       MimeType=x-scheme-handler/sgnl;x-scheme-handler/signalcaptcha;
       Categories=Network;InstantMessaging;Chat;
     '';
+  } // lib.attrsets.optionalAttrs (!isThinkpad) {
+    # On desktop, statically configure monitors
+    "monitors.xml".source = ../../../conf.d/gnome-monitors.xml;
   };
 } else
   { }

hosts/pc/default.nix

@@ -80,5 +80,4 @@
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.stateVersion = "22.11"; # Did you read the comment?
-
 }

nixos-modules/desktop_environment.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ pkgs, lib, isThinkpad, ... }:
 let
   monitor_config = pkgs.writeText "gdm_monitors.xml"
     (builtins.readFile ../conf.d/gnome-monitors.xml);
@@ -22,10 +22,7 @@ in {
       });
     })
   ];
-  # make GDM use the same monitor config as GNOME;
-  # see: https://discourse.nixos.org/t/set-external-monitor-as-primary-display-before-login/37844/4
-  systemd.tmpfiles.rules =
-    [ "L+ /run/gdm/.config/monitors.xml - - - - ${monitor_config}" ];
+
   services = {
     displayManager.defaultSession = "gnome-xorg";
     xserver = {
@@ -61,4 +58,9 @@ in {
     package = pkgs.gnomeExtensions.gsconnect;
   };
   programs.dconf.enable = true;
+} // lib.attrsets.optionalAttrs (!isThinkpad) {
+  # make GDM use the same monitor config as GNOME;
+  # see: https://discourse.nixos.org/t/set-external-monitor-as-primary-display-before-login/37844/4
+  systemd.tmpfiles.rules =
+    [ "L+ /run/gdm/.config/monitors.xml - - - - ${monitor_config}" ];
 }