From d9b0995b44a63a601a75c3080c2e8f7afd31d449 Mon Sep 17 00:00:00 2001
From: Adam Honse <calcprogrammer1@gmail.com>
Date: Tue, 14 Jul 2026 11:55:52 -0500
Subject: [PATCH] Run RescanDevices in a background thread to avoid locking the
 UI thread and causing a deadlock in the plugins

---
 .../ManualDevicesSettingsPage.cpp                     | 11 +++++++----
 qt/OpenRGBDialog/OpenRGBDialog.cpp                    |  7 +++++--
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/qt/ManualDevicesSettingsPage/ManualDevicesSettingsPage.cpp b/qt/ManualDevicesSettingsPage/ManualDevicesSettingsPage.cpp
index 2237fdbcc..9f10768c2 100644
--- a/qt/ManualDevicesSettingsPage/ManualDevicesSettingsPage.cpp
+++ b/qt/ManualDevicesSettingsPage/ManualDevicesSettingsPage.cpp
@@ -8,6 +8,7 @@
 |   SPDX-License-Identifier: GPL-2.0-or-later               |
 \*---------------------------------------------------------*/
 
+#include <thread>
 #include "ManualDevicesSettingsPage.h"
 #include "ui_ManualDevicesSettingsPage.h"
 
@@ -337,9 +338,11 @@ void ManualDevicesSettingsPage::on_ActionSaveAndRescan_triggered()
 {
     saveSettings();
 
-    /*---------------------------------------------------------*\
-    | Trigger rescan                                            |
-    \*---------------------------------------------------------*/
-    ResourceManager::get()->RescanDevices();
+    /*-----------------------------------------------------*\
+    | Run RescanDevices in an asynchronous thread to avoid  |
+    | locking the UI thread                                 |
+    \*-----------------------------------------------------*/
+    std::thread rescan_thread([](){ResourceManager::get()->RescanDevices();});
+    rescan_thread.detach();
 }
 
diff --git a/qt/OpenRGBDialog/OpenRGBDialog.cpp b/qt/OpenRGBDialog/OpenRGBDialog.cpp
index 0d39959c2..bc20e9b5e 100644
--- a/qt/OpenRGBDialog/OpenRGBDialog.cpp
+++ b/qt/OpenRGBDialog/OpenRGBDialog.cpp
@@ -7,6 +7,7 @@
 |   SPDX-License-Identifier: GPL-2.0-or-later               |
 \*---------------------------------------------------------*/
 
+#include <thread>
 #include "AutoStart.h"
 #include "OpenRGBDialog.h"
 #include "JsonUtils.h"
@@ -2018,9 +2019,11 @@ void OpenRGBDialog::SaveProfileAs()
 void OpenRGBDialog::on_ButtonRescan_clicked()
 {
     /*-----------------------------------------------------*\
-    | Rescan devices in ResourceManager                     |
+    | Run RescanDevices in an asynchronous thread to avoid  |
+    | locking the UI thread                                 |
     \*-----------------------------------------------------*/
-    ResourceManager::get()->RescanDevices();
+    std::thread rescan_thread([](){ResourceManager::get()->RescanDevices();});
+    rescan_thread.detach();
 }
 
 void OpenRGBDialog::on_ActionSaveProfile_triggered()