1 files changed, 46 insertions, 1 deletions
diff --git a/indra/newview/llfeaturemanager.cpp b/indra/newview/llfeaturemanager.cpp
index 2bbe5e90c6..9e69fcef29 100644
--- a/indra/newview/llfeaturemanager.cpp
+++ b/indra/newview/llfeaturemanager.cpp
@@ -404,8 +404,53 @@ F32 logExceptionBenchmark()
 }
 #endif
 
+bool checkRDNA35()
+{
+    // This checks if we're running on an RDNA3.5 GPU.  You're only going to see these on AMD's APUs.
+    // As of driver version 25, we're seeing stalls in some of our queries.
+    // This appears to be a driver bug, and appears to be specific RDNA3.5 APUs.
+    // There's multiples of these guys, so we just use this function to check if that GPU is on the list of known RDNA3.5 APUs.
+    // - Geenz 11/12/2025
+    std::array<std::string, 7> rdna35GPUs = {
+        "8060S",
+        "8050S",
+        "8040S",
+        "860M",
+        "840M",
+        "890M",
+        "880M"
+    };
+
+    for (const auto& gpu_name : rdna35GPUs)
+    {
+        if (gGLManager.getRawGLString().find(gpu_name) != std::string::npos)
+        {
+            LL_WARNS("RenderInit") << "Detected AMD RDNA3.5 GPU (" << gpu_name << ")." << LL_ENDL;
+            return true;
+        }
+    }
+
+    return false;
+}
+
 bool LLFeatureManager::loadGPUClass()
 {
+    // This is a hack for certain AMD GPUs in newer driver versions on certain APUs.
+    // These GPUs will show inconsistent freezes when attempting to run shader profiles against them.
+    // This is extremely problematic as it can lead to:
+    // - Login freezes
+    // - Inability to start the client
+    // - Completely random avatars triggering a freeze
+    // As a result, we filter out these GPUs for shader profiling.
+    // - Geenz 11/11/2025
+
+    if (gGLManager.getRawGLString().find("Radeon") != std::string::npos && checkRDNA35() && gGLManager.mDriverVersionVendorString.find("25.") != std::string::npos)
+    {
+        LL_WARNS("RenderInit") << "Detected AMD RDNA3.5 GPU on a known bad driver; disabling benchmark and occlusion culling to prevent freezes." << LL_ENDL;
+        gSavedSettings.setBOOL("SkipBenchmark", true);
+        gSavedSettings.setBOOL("UseOcclusion", false);
+    }
+
     if (!gSavedSettings.getBOOL("SkipBenchmark"))
     {
         F32 class1_gbps = gSavedSettings.getF32("RenderClass1MemoryBandwidth");
@@ -465,7 +510,7 @@ bool LLFeatureManager::loadGPUClass()
         }
 
     #if LL_WINDOWS
-        const F32Gigabytes MIN_PHYSICAL_MEMORY(2);
+        const F32Gigabytes MIN_PHYSICAL_MEMORY(8);
 
         LLMemory::updateMemoryInfo();
         F32Gigabytes physical_mem = LLMemory::getMaxMemKB();