From 9b2d0787c06cb367d867249b5688af7402bd756e Mon Sep 17 00:00:00 2001
From: Gabriele Franchina <66174301+Gabry179@users.noreply.github.com>
Date: Wed, 12 Aug 2026 23:33:22 +0200
Subject: [PATCH] launcher: add vulkan_device setting to launcher UI

---
 launcher/launcher.py   |  1 +
 launcher/ui/index.html | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/launcher/launcher.py b/launcher/launcher.py
index 78e015d2..8f3fd70b 100755
--- a/launcher/launcher.py
+++ b/launcher/launcher.py
@@ -255,6 +255,7 @@ def set_capture(enable):
     # graphics backend: "" = automatic (Vulkan first, D3D12 fallback on
     # Windows), "vulkan" or "d3d12" to force one. Chosen at startup.
     "gpu": ("str", "", True),
+    "vulkan_device": ("str", "", True),
     # audio
     "audio_mute": ("bool", False, False),
     "audio_maxqframes": ("int", 32, True),
diff --git a/launcher/ui/index.html b/launcher/ui/index.html
index e48fadaa..849e94f9 100644
--- a/launcher/ui/index.html
+++ b/launcher/ui/index.html
@@ -303,6 +303,15 @@ <h2>DISPLAY</h2>
           </select>
           <div class="hint">Vulkan plays the intro videos and matches console colors. Pick Direct3D 12 only if Vulkan fails on your GPU. Restart needed.</div>
         </div>
+        <div class="field">
+          <label>Vulkan Device (Multi-GPU / Laptop)</label>
+          <select id="s-vulkan_device">
+            <option value="">Automatic (Recommended)</option>
+            <option value="0">Device 0</option>
+            <option value="1">Device 1</option>
+          </select>
+          <div class="hint">Select the GPU device index to use when GPU backend is set to Vulkan. Leave on Automatic if unsure.</div>
+        </div>
         <div class="field">
           <label class="switch"><input type="checkbox" id="s-vsync"> VSync</label>
         </div>
@@ -1053,6 +1062,7 @@ <h3>Credits</h3>
   $("#s-fullscreen").value = String(v.fullscreen);
   $("#s-resolution").value = v.resolution || "";
   $("#s-gpu").value = v.gpu || "";
+  $("#s-vulkan_device").value = v.vulkan_device || "";
   $("#s-vsync").checked = v.vsync;
   $("#s-present_letterbox").checked = v.present_letterbox;
   $("#s-resolution_scale").value = String(v.resolution_scale);
@@ -1075,6 +1085,7 @@ <h3>Credits</h3>
     fullscreen: $("#s-fullscreen").value === "true",
     resolution: $("#s-resolution").value,
     gpu: $("#s-gpu").value,
+    vulkan_device: $("#s-vulkan_device").value,
     vsync: $("#s-vsync").checked,
     present_letterbox: $("#s-present_letterbox").checked,
     resolution_scale: Number($("#s-resolution_scale").value),