3 files changed, 16 insertions, 3 deletions
diff --git a/src/quick/scenegraph/qsgrenderloop.cpp b/src/quick/scenegraph/qsgrenderloop.cpp
index 58dfd97e03..08d1c726ab 100644
--- a/src/quick/scenegraph/qsgrenderloop.cpp
+++ b/src/quick/scenegraph/qsgrenderloop.cpp
@@ -214,9 +214,7 @@ QSGRenderLoop *QSGRenderLoop::instance()
 {
     if (!s_instance) {
 
-        // For compatibility with 5.3 and earlier's QSG_INFO environment variables
-        if (qEnvironmentVariableIsSet("QSG_INFO"))
-            const_cast<QLoggingCategory &>(QSG_LOG_INFO()).setEnabled(QtDebugMsg, true);
+        QSGRhiSupport::checkEnvQSgInfo();
 
         s_instance = QSGContext::createWindowManager();
 #ifdef ENABLE_DEFAULT_BACKEND
diff --git a/src/quick/scenegraph/qsgrhisupport.cpp b/src/quick/scenegraph/qsgrhisupport.cpp
index 8bae24dc76..a92b6b0c84 100644
--- a/src/quick/scenegraph/qsgrhisupport.cpp
+++ b/src/quick/scenegraph/qsgrhisupport.cpp
@@ -109,6 +109,12 @@ void QSGRhiSupport::applySettings()
 {
     m_set = true;
 
+    // This is also done when creating the renderloop but we may be before that
+    // in case we get here due to a setScenegraphBackend() -> configure() early
+    // on in main(). Avoid losing info logs since troubleshooting gets
+    // confusing otherwise.
+    QSGRhiSupport::checkEnvQSgInfo();
+
     if (m_requested.valid) {
         // explicit rhi backend request from C++ (e.g. via QQuickWindow)
         m_enableRhi = m_requested.rhi;
@@ -203,6 +209,13 @@ QSGRhiSupport *QSGRhiSupport::staticInst()
     return &inst;
 }
 
+void QSGRhiSupport::checkEnvQSgInfo()
+{
+    // For compatibility with 5.3 and earlier's QSG_INFO environment variables
+    if (qEnvironmentVariableIsSet("QSG_INFO"))
+        const_cast<QLoggingCategory &>(QSG_LOG_INFO()).setEnabled(QtDebugMsg, true);
+}
+
 void QSGRhiSupport::configure(QSGRendererInterface::GraphicsApi api)
 {
     Q_ASSERT(QSGRendererInterface::isApiRhiBased(api));
diff --git a/src/quick/scenegraph/qsgrhisupport_p.h b/src/quick/scenegraph/qsgrhisupport_p.h
index 0e1881aa00..f2d5837bba 100644
--- a/src/quick/scenegraph/qsgrhisupport_p.h
+++ b/src/quick/scenegraph/qsgrhisupport_p.h
@@ -126,6 +126,8 @@ public:
 
     QImage grabAndBlockInCurrentFrame(QRhi *rhi, QRhiSwapChain *swapchain);
 
+    static void checkEnvQSgInfo();
+
 private:
     QSGRhiSupport();
     void applySettings();