--- a/gfx/layers/ipc/CompositorBridgeChild.cpp
+++ b/gfx/layers/ipc/CompositorBridgeChild.cpp
@@ -364,16 +364,23 @@ CompositorBridgeChild::RecvCompositorUpd
     MOZ_ASSERT(aLayersId == 0);
   } else if (aLayersId != 0) {
     // Update gfxPlatform if this is the first time we're seeing this compositor
     // update (we will get an update for each connected tab).
     static uint64_t sLastSeqNo = 0;
     if (sLastSeqNo != aSeqNo) {
       gfxPlatform::GetPlatform()->CompositorUpdated();
       sLastSeqNo = aSeqNo;
+
+      // If we still get device reset here, something must wrong when creating
+      // d3d11 devices.
+      if (gfxPlatform::GetPlatform()->DidRenderingDeviceReset()) {
+        gfxCriticalError() << "Unexpected reset device processing when \
+                               updating compositor.";
+      }
     }
 
     if (dom::TabChild* child = dom::TabChild::GetFrom(aLayersId)) {
       child->CompositorUpdated(aNewIdentifier);
     }
     if (!mCanSend) {
       return IPC_OK();
     }

--- a/gfx/thebes/gfxWindowsPlatform.cpp
+++ b/gfx/thebes/gfxWindowsPlatform.cpp
@@ -1511,16 +1511,24 @@ gfxWindowsPlatform::InitializeD3D11()
   DeviceManagerDx* dm = DeviceManagerDx::Get();
   if (XRE_IsParentProcess()) {
     if (!dm->CreateCompositorDevices()) {
       return;
     }
   }
 
   dm->CreateContentDevices();
+
+  // Content process failed to create the d3d11 device while parent process
+  // succeed.
+  if (XRE_IsContentProcess() &&
+      !gfxConfig::IsEnabled(Feature::D3D11_COMPOSITING)) {
+    gfxCriticalError() << "[D3D11] Failed to create the D3D11 device in content \
+                           process.";
+  }
 }
 
 void
 gfxWindowsPlatform::InitializeD2DConfig()
 {
   FeatureState& d2d1 = gfxConfig::GetFeature(Feature::DIRECT2D);
 
   if (!gfxConfig::IsEnabled(Feature::D3D11_COMPOSITING)) {