From 10a699b7743638ddc175645544c3e3967fa94223 Mon Sep 17 00:00:00 2001
From: jthedering <51533355+jthedering@users.noreply.github.com>
Date: Thu, 19 May 2022 20:21:35 +0000
Subject: [PATCH] Fixed: Bluetooth devices on Windows 11 often did not work
 when multiple devices were combined (headphones and hands-free). In this
 case, installation as SFX/MFX is now used by default as EFX does not work.

---
 DeviceAPOInfo.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/DeviceAPOInfo.cpp b/DeviceAPOInfo.cpp
index 6a148f0..180c802 100644
--- a/DeviceAPOInfo.cpp
+++ b/DeviceAPOInfo.cpp
@@ -44,6 +44,7 @@ static const wchar_t* allowSilentBufferValueName = L"AllowSilentBufferModificati
 static const wchar_t* versionValueName = L"Version";
 static const wchar_t* connectionValueName = L"{a45c254e-df1c-4efd-8020-67d146a850e0},2";
 static const wchar_t* deviceValueName = L"{b3f8fa53-0004-438e-9003-51a46e139bfc},6";
+static const wchar_t* combinedDeviceValueName = L"{b3f8fa53-0004-438e-9003-51a46e139bfc},41";
 static const wchar_t* formatValueName = L"{f19f064d-082c-4e27-bc73-6882a1bb8e4c},0";
 static const wchar_t* channelMaskValueName = L"{1da5d803-d492-4edd-8c23-e0c0ffee7f0e},3";
 static const wchar_t* lfxGuidValueName = L"{d04e05a6-594b-4fb6-a80d-01af5eed7d1d},1";
@@ -369,6 +370,9 @@ bool DeviceAPOInfo::load(const wstring& deviceGuid, wstring defaultDeviceGuid)
 					&& !RegistryHelper::valueExists(keyPath + L"\\FxProperties", multiMfxGuidValueName)
 					&& !RegistryHelper::valueExists(keyPath + L"\\FxProperties", multiEfxGuidValueName))
 					currentInstallState.installMode = INSTALL_LFX_GFX;
+				// bluetooth devices may be combined in Windows 11, EFX will not work then
+				else if (RegistryHelper::valueExists(keyPath + L"\\Properties", combinedDeviceValueName))
+					currentInstallState.installMode = INSTALL_SFX_MFX;
 				else
 					currentInstallState.installMode = INSTALL_SFX_EFX;
 			}