vanadium/autorandr: update orchid brightness

nix/configurations/vanadium.nix

@@ -107,6 +107,7 @@ in
       ../nixosModules/common/network.nix
       ../nixosModules/common/sudo-conf.nix
       ../nixosModules/common/system-nixconf.nix
+      ../nixosModules/common/xscreensaver.nix
 
       ../nixosModules/extra/zram.nix
       ../nixosModules/extra/leana.nix

nix/configurations/vanadium/home/xmobar/xmobar.hs

@@ -76,7 +76,8 @@ config =
               , "--target", "2025-09-16=snip snip"
               , "--target", "2025-10-13=no teef"
               , "--target", "2025-10-31=dragon book"
-              , "--target", "2025-12-22=escape my fate"
+              , "--target", "2025-11-29=à deux"
+              , "--target", "2025-12-30=seule"
               ]
               ""
               (60 &minute)

nix/configurations/vanadium/nixos/display.nix

@@ -51,7 +51,7 @@
 
       switches = {
         setDPI = {dpi}:
-          singleton "10_xrdb-dpi" "xrdb -merge ${pkgs.writeText "xrdb-dpi-config" ''
+          singleton "10_xrdb-dpi" "${lib.getExe pkgs.xorg.xrdb} -merge ${pkgs.writeText "xrdb-dpi-config" ''
             Xcursor.size: 64
             Xft.dpi:   ${toString dpi}
           ''}";
@@ -61,8 +61,12 @@
           device, # obtain with `xrandr`
           brightness, # [0..1]
         }:
+        # Hack:
+        # xrandr would consider the display being connected before we can change its brightness
+        # For that reason, we can't base our delay on its output, sadly.
           singleton "10_xrandr_brightness" ''
-            xrandr --output ${device} --brightness ${toString brightness}
+            sleep 10
+            ${lib.getExe pkgs.xorg.xrandr} --output ${device} --brightness ${toString brightness}
           '';
 
         # Is scoped to an output device, no need to be called on built-in display
@@ -71,7 +75,7 @@
           brightness, # [0..1]
         }:
           singleton "10_ddc_brightness" ''
-            ddcutil --model ${modelName} setvcp 10 ${toString (builtins.floor (brightness * 100))}
+            ${lib.getExe pkgs.ddcutil} --model ${modelName} setvcp 10 ${toString (builtins.floor (brightness * 100))}
           '';
 
         setDDCContrast = {
@@ -79,7 +83,7 @@
           contrast, # [0..1]
         }:
           singleton "10_ddc_contrast" ''
-            ddcutil --model ${modelName} setvcp 12 ${toString (builtins.floor (contrast * 100))}
+            ${lib.getExe pkgs.ddcutil} --model ${modelName} setvcp 12 ${toString (builtins.floor (contrast * 100))}
           '';
       };
 
@@ -160,21 +164,13 @@
           configs.allOff
           (configs.enableOrchid name)
         ];
+        # seems like this display doesn't support DDC
         hooks.postswitch = lib.mkMerge [
           (switches.setDPI {dpi = 100;})
           (switches.setSoftwareBrightness {
             device = name;
-            brightness = 1;
+            brightness = 0.7;
           })
-          # # seems like this display doesn't support DDC
-          # (switches.setDDCBrightness {
-          #   modelName = "VG27AQL3A";
-          #   brightness = 0;
-          # })
-          # (switches.setDDCContrast {
-          #   modelName = "VG27AQL3A";
-          #   contrast = 0.5;
-          # })
         ];
       };
     in

nix/configurations/vanadium/nixos/gui.nix

@@ -1,4 +1,8 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  lib,
+  ...
+}: {
   services.xserver.windowManager.xmonad = {
     enable = true;
     enableContribAndExtras = true;
@@ -20,7 +24,15 @@
     };
   };
 
-  services.xscreensaver.enable = true;
+  services.xscreensaver = {
+    enable = true;
+    hooks = {
+      # Reset display setting on login
+      "UNBLANK" = ''
+        ${lib.getExe pkgs.autorandr} --change --ignore-lid
+      '';
+    };
+  };
 
   services.picom = {
     enable = true;

nix/nixosModules/common/xscreensaver.nix

@@ -0,0 +1,48 @@
+#
+# This module provides a service react to xscreensaver events
+#
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.services.xscreensaver;
+in {
+  options = {
+    services.xscreensaver.hooks = lib.mkOption {
+      type = with lib.types; attrsOf str;
+      description = "An attrset of events mapped a block of shell command to be run";
+      default = {};
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.user.services = {
+      "xscreensaver-hooks" = {
+        description = "Run commands on xscreensaver events";
+        after = ["graphical-session.target" "xscreensaver.service"];
+        partOf = ["graphical-session.target"];
+        wantedBy = ["graphical-session.target"];
+        script = let
+          handlers =
+            lib.concatMapAttrsStringSep "\n" (event: action: ''
+              "${event}")
+                      ( ${action}
+                      )
+                      ;;
+            '')
+            cfg.hooks;
+        in ''
+          xscreensaver-command -watch | while read event rest; do
+            case $event in
+              ${handlers}
+            esac
+          done
+        '';
+        path = [
+          cfg.package # contains xscreensaver-command
+        ];
+      };
+    };
+  };
+}