sway: Add hack for mayushii’s external monitor

users/simon/modules/sway/default.nix

@@ -26,6 +26,15 @@ let
   wallpaper = if nixosConfig.sbruder.unfree.allowAssets then wallpaperUnfree else wallpaperFree;
 
   cfg = config.wayland.windowManager.sway.config;
+
+  # Due to various issues in sway and drm,
+  # https://github.com/swaywm/sway/issues/5759 and
+  # https://gitlab.freedesktop.org/drm/amd/-/issues/1376,
+  # my external monitor often does not turn on after it has been turned off (DPMS).
+  # This hack fixes this, by not using kanshi for mayushi
+  # and instead disabling the internal display based on the lid switch state.
+  # Taken from https://github.com/swaywm/sway/wiki#clamshell-mode
+  clamshellHack = nixosConfig.networking.hostName == "mayushii";
 in
 {
   imports = lib.optionals nixosConfig.sbruder.gui.enable [
@@ -47,7 +56,15 @@ in
 
       menu = "${pkgs.dmenu-wayland}/bin/dmenu-wl_path | ${pkgs.dmenu-wayland}/bin/dmenu-wl -nb '#002b36' -nf '#839496' -sb '#859900' -sf '#073642' | ${pkgs.findutils}/bin/xargs swaymsg exec --";
 
-      output."*".bg = "${wallpaper} fill";
+      output = {
+        "*".bg = "${wallpaper} fill";
+      } // (lib.optionalAttrs clamshellHack {
+        "Acer Technologies Acer B277K 0x0000F36C" = {
+          position = "1920,0";
+          scale = "2";
+          mode = "3840x2160";
+        };
+      });
 
       input = {
         "type:keyboard" = {
@@ -246,7 +263,18 @@ in
           dbus-update-activation-environment --systemd ${environmentVariables} && \
           systemctl --user start sway-session.target
       ''
-    );
+    ) + (lib.optionalString clamshellHack ''
+      bindswitch --reload --locked lid:on output eDP-1 disable
+      bindswitch --reload --locked lid:off output eDP-1 enable
+
+      exec_always ${pkgs.writeShellScript "sway-lid-switch-toggle-output" /* bash */ ''
+        if grep -q open /proc/acpi/button/lid/LID/state; then
+            swaymsg output eDP-1 enable
+        else
+            swaymsg output eDP-1 disable
+        fi
+      ''}
+    '');
   };
 
   systemd.user.targets.sway-session = {

users/simon/modules/sway/kanshi.nix

@@ -6,27 +6,9 @@ let
     else { };
 
   machineConfigs = {
-    mayushii = {
+    # mayushii is handled separately in sway’s main configuration.
-      standalone.outputs = lib.singleton {
+    # See it for more details.
-        criteria = "eDP-1";
+    # mayushii = { };
-        mode = "1920x1080";
-        position = "0,0";
-        status = "enable";
-      };
-      home.outputs = [
-        {
-          criteria = "eDP-1";
-          position = "1920,0";
-          status = "disable";
-        }
-        {
-          criteria = "Acer Technologies Acer B277K 0x0000F36C";
-          mode = "3840x2160";
-          position = "0,0";
-          scale = 2.0;
-        }
-      ];
-    };
     sayuri = {
       home.outputs = lib.singleton {
         criteria = "Acer Technologies Acer B277K 0x0000F36C";