diff --git a/src/plugins/platforms/winrt/qwinrtbackingstore.cpp b/src/plugins/platforms/winrt/qwinrtbackingstore.cpp
index 4517200a2d..fc7ab15f73 100644
--- a/src/plugins/platforms/winrt/qwinrtbackingstore.cpp
+++ b/src/plugins/platforms/winrt/qwinrtbackingstore.cpp
@@ -47,6 +47,9 @@
 
 QT_BEGIN_NAMESPACE
 
+Q_LOGGING_CATEGORY(lcQpaBackingStore, "qt.qpa.backingstore")
+Q_LOGGING_CATEGORY(lcQpaBackingStoreVerbose, "qt.qpa.backingstore.verbose")
+
 class QWinRTBackingStorePrivate
 {
 public:
@@ -62,6 +65,7 @@ QWinRTBackingStore::QWinRTBackingStore(QWindow *window)
     : QPlatformBackingStore(window), d_ptr(new QWinRTBackingStorePrivate)
 {
     Q_D(QWinRTBackingStore);
+    qCDebug(lcQpaBackingStore) << __FUNCTION__ << this << window;
 
     d->initialized = false;
     d->screen = static_cast<QWinRTScreen*>(window->screen()->handle());
@@ -73,6 +77,7 @@ QWinRTBackingStore::QWinRTBackingStore(QWindow *window)
 bool QWinRTBackingStore::initialize()
 {
     Q_D(QWinRTBackingStore);
+    qCDebug(lcQpaBackingStoreVerbose) << __FUNCTION__ << d->initialized;
 
     if (d->initialized)
         return true;
@@ -94,6 +99,7 @@ bool QWinRTBackingStore::initialize()
 
 QWinRTBackingStore::~QWinRTBackingStore()
 {
+    qCDebug(lcQpaBackingStore) << __FUNCTION__ << this;
 }
 
 QPaintDevice *QWinRTBackingStore::paintDevice()
@@ -107,6 +113,8 @@ void QWinRTBackingStore::flush(QWindow *window, const QRegion &region, const QPo
     Q_D(QWinRTBackingStore);
     Q_UNUSED(offset)
 
+    qCDebug(lcQpaBackingStoreVerbose) << __FUNCTION__ << this << window << region;
+
     if (d->size.isEmpty())
         return;
 
@@ -140,6 +148,8 @@ void QWinRTBackingStore::resize(const QSize &size, const QRegion &staticContents
     Q_D(QWinRTBackingStore);
     Q_UNUSED(staticContents)
 
+    qCDebug(lcQpaBackingStoreVerbose) << __FUNCTION__ << this << size;
+
     if (!initialize())
         return;
 
@@ -169,11 +179,14 @@ QImage QWinRTBackingStore::toImage() const
 
 void QWinRTBackingStore::beginPaint(const QRegion &region)
 {
+    qCDebug(lcQpaBackingStoreVerbose) << __FUNCTION__ << this << region;
+
     resize(window()->size(), region);
 }
 
 void QWinRTBackingStore::endPaint()
 {
+    qCDebug(lcQpaBackingStoreVerbose) << __FUNCTION__ << this;
 }
 
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/winrt/qwinrtbackingstore.h b/src/plugins/platforms/winrt/qwinrtbackingstore.h
index 20b27a3865..b5d9dfed4f 100644
--- a/src/plugins/platforms/winrt/qwinrtbackingstore.h
+++ b/src/plugins/platforms/winrt/qwinrtbackingstore.h
@@ -39,9 +39,13 @@
 
 #include <qpa/qplatformbackingstore.h>
 #include <QtCore/QScopedPointer>
+#include <QtCore/QLoggingCategory>
 
 QT_BEGIN_NAMESPACE
 
+Q_DECLARE_LOGGING_CATEGORY(lcQpaBackingStore)
+Q_DECLARE_LOGGING_CATEGORY(lcQpaBackingStoreVerbose)
+
 class QWinRTScreen;
 
 class QWinRTBackingStorePrivate;
diff --git a/src/plugins/platforms/winrt/qwinrtfontdatabase.cpp b/src/plugins/platforms/winrt/qwinrtfontdatabase.cpp
index 793256a83f..22fb8cb63e 100644
--- a/src/plugins/platforms/winrt/qwinrtfontdatabase.cpp
+++ b/src/plugins/platforms/winrt/qwinrtfontdatabase.cpp
@@ -47,6 +47,20 @@ using namespace Microsoft::WRL;
 
 QT_BEGIN_NAMESPACE
 
+Q_LOGGING_CATEGORY(lcQpaFonts, "qt.qpa.fonts")
+
+QDebug operator<<(QDebug d, const QFontDef &def)
+{
+    QDebugStateSaver saver(d);
+    d.nospace();
+    d << "Family=" << def.family << " Stylename=" << def.styleName
+        << " pointsize=" << def.pointSize << " pixelsize=" << def.pixelSize
+        << " styleHint=" << def.styleHint << " weight=" << def.weight
+        << " stretch=" << def.stretch << " hintingPreference="
+        << def.hintingPreference;
+    return d;
+}
+
 // Based on unicode range tables at http://www.microsoft.com/typography/otspec/os2.htm#ur
 static QFontDatabase::WritingSystem writingSystemFromUnicodeRange(const DWRITE_UNICODE_RANGE &range)
 {
@@ -114,6 +128,7 @@ static QFontDatabase::WritingSystem writingSystemFromUnicodeRange(const DWRITE_U
 
 QString QWinRTFontDatabase::fontDir() const
 {
+    qCDebug(lcQpaFonts) << __FUNCTION__;
     QString fontDirectory = QBasicFontDatabase::fontDir();
     if (!QFile::exists(fontDirectory)) {
         // Fall back to app directory + fonts, and just app directory after that
@@ -130,6 +145,8 @@ QString QWinRTFontDatabase::fontDir() const
 
 QWinRTFontDatabase::~QWinRTFontDatabase()
 {
+    qCDebug(lcQpaFonts) << __FUNCTION__;
+
     foreach (IDWriteFontFile *fontFile, m_fonts.keys())
         fontFile->Release();
 
@@ -149,6 +166,8 @@ bool QWinRTFontDatabase::fontsAlwaysScalable() const
 
 void QWinRTFontDatabase::populateFontDatabase()
 {
+    qCDebug(lcQpaFonts) << __FUNCTION__;
+
     ComPtr<IDWriteFactory1> factory;
     HRESULT hr = DWriteCreateFactory(DWRITE_FACTORY_TYPE_ISOLATED, __uuidof(IDWriteFactory1), &factory);
     if (FAILED(hr)) {
@@ -204,6 +223,8 @@ void QWinRTFontDatabase::populateFontDatabase()
 
 void QWinRTFontDatabase::populateFamily(const QString &familyName)
 {
+    qCDebug(lcQpaFonts) << __FUNCTION__ << familyName;
+
     IDWriteFontFamily *fontFamily = m_fontFamilies.value(familyName);
     if (!fontFamily) {
         qWarning("The font family %s was not found.", qPrintable(familyName));
@@ -367,6 +388,8 @@ void QWinRTFontDatabase::populateFamily(const QString &familyName)
 
 QFontEngine *QWinRTFontDatabase::fontEngine(const QFontDef &fontDef, void *handle)
 {
+    qCDebug(lcQpaFonts) << __FUNCTION__ << "FONTDEF" << fontDef << handle;
+
     if (!handle) // Happens if a font family population failed
         return 0;
 
@@ -436,6 +459,8 @@ QStringList QWinRTFontDatabase::fallbacksForFamily(const QString &family, QFont:
     Q_UNUSED(styleHint)
     Q_UNUSED(script)
 
+    qCDebug(lcQpaFonts) << __FUNCTION__ << family;
+
     QStringList result;
     if (family == QLatin1String("Helvetica"))
         result.append(QStringLiteral("Arial"));
@@ -445,6 +470,8 @@ QStringList QWinRTFontDatabase::fallbacksForFamily(const QString &family, QFont:
 
 void QWinRTFontDatabase::releaseHandle(void *handle)
 {
+    qCDebug(lcQpaFonts) << __FUNCTION__ << handle;
+
     if (!handle)
         return;
 
diff --git a/src/plugins/platforms/winrt/qwinrtfontdatabase.h b/src/plugins/platforms/winrt/qwinrtfontdatabase.h
index 41619f5bd8..e8495e202f 100644
--- a/src/plugins/platforms/winrt/qwinrtfontdatabase.h
+++ b/src/plugins/platforms/winrt/qwinrtfontdatabase.h
@@ -38,12 +38,15 @@
 #define QWINRTFONTDATABASE_H
 
 #include <QtPlatformSupport/private/qbasicfontdatabase_p.h>
+#include <QtCore/QLoggingCategory>
 
 struct IDWriteFontFile;
 struct IDWriteFontFamily;
 
 QT_BEGIN_NAMESPACE
 
+Q_DECLARE_LOGGING_CATEGORY(lcQpaFonts)
+
 struct FontDescription
 {
     quint32 index;
diff --git a/src/plugins/platforms/winrt/qwinrtinputcontext.cpp b/src/plugins/platforms/winrt/qwinrtinputcontext.cpp
index 9228ef8d62..72fc378760 100644
--- a/src/plugins/platforms/winrt/qwinrtinputcontext.cpp
+++ b/src/plugins/platforms/winrt/qwinrtinputcontext.cpp
@@ -54,6 +54,8 @@ typedef ITypedEventHandler<InputPane*, InputPaneVisibilityEventArgs*> InputPaneV
 
 QT_BEGIN_NAMESPACE
 
+Q_LOGGING_CATEGORY(lcQpaInputMethods, "qt.qpa.input.methods")
+
 inline QRectF getInputPaneRect(IInputPane *pane, qreal scaleFactor)
 {
     Rect rect;
@@ -78,6 +80,8 @@ inline QRectF getInputPaneRect(IInputPane *pane, qreal scaleFactor)
 QWinRTInputContext::QWinRTInputContext(QWinRTScreen *screen)
     : m_screen(screen)
 {
+    qCDebug(lcQpaInputMethods) << __FUNCTION__ << screen;
+
     IInputPaneStatics *statics;
     if (FAILED(GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_UI_ViewManagement_InputPane).Get(),
                                     &statics))) {
@@ -114,6 +118,7 @@ bool QWinRTInputContext::isInputPanelVisible() const
 
 HRESULT QWinRTInputContext::onShowing(IInputPane *pane, IInputPaneVisibilityEventArgs *)
 {
+    qCDebug(lcQpaInputMethods) << __FUNCTION__ << pane;
     m_isInputPanelVisible = true;
     emitInputPanelVisibleChanged();
     return handleVisibilityChange(pane);
@@ -121,6 +126,7 @@ HRESULT QWinRTInputContext::onShowing(IInputPane *pane, IInputPaneVisibilityEven
 
 HRESULT QWinRTInputContext::onHiding(IInputPane *pane, IInputPaneVisibilityEventArgs *)
 {
+    qCDebug(lcQpaInputMethods) << __FUNCTION__ << pane;
     m_isInputPanelVisible = false;
     emitInputPanelVisibleChanged();
     return handleVisibilityChange(pane);
@@ -128,6 +134,7 @@ HRESULT QWinRTInputContext::onHiding(IInputPane *pane, IInputPaneVisibilityEvent
 
 HRESULT QWinRTInputContext::handleVisibilityChange(IInputPane *pane)
 {
+    qCDebug(lcQpaInputMethods) << __FUNCTION__ << pane;
     const QRectF keyboardRect = getInputPaneRect(pane, m_screen->scaleFactor());
     if (m_keyboardRect != keyboardRect) {
         m_keyboardRect = keyboardRect;
@@ -165,6 +172,8 @@ static HRESULT getInputPane(ComPtr<IInputPane2> *inputPane2)
 
 void QWinRTInputContext::showInputPanel()
 {
+    qCDebug(lcQpaInputMethods) << __FUNCTION__;
+
     QEventDispatcherWinRT::runOnXamlThread([&]() {
         ComPtr<IInputPane2> inputPane;
         HRESULT hr = getInputPane(&inputPane);
@@ -180,6 +189,8 @@ void QWinRTInputContext::showInputPanel()
 
 void QWinRTInputContext::hideInputPanel()
 {
+    qCDebug(lcQpaInputMethods) << __FUNCTION__;
+
     QEventDispatcherWinRT::runOnXamlThread([&]() {
         ComPtr<IInputPane2> inputPane;
         HRESULT hr = getInputPane(&inputPane);
diff --git a/src/plugins/platforms/winrt/qwinrtinputcontext.h b/src/plugins/platforms/winrt/qwinrtinputcontext.h
index 6f88ff46e6..d5a1a40efc 100644
--- a/src/plugins/platforms/winrt/qwinrtinputcontext.h
+++ b/src/plugins/platforms/winrt/qwinrtinputcontext.h
@@ -39,6 +39,7 @@
 
 #include <qpa/qplatforminputcontext.h>
 #include <QtCore/QRectF>
+#include <QtCore/QLoggingCategory>
 
 #include <wrl.h>
 
@@ -58,6 +59,8 @@ namespace ABI {
 
 QT_BEGIN_NAMESPACE
 
+Q_DECLARE_LOGGING_CATEGORY(lcQpaInputMethods)
+
 class QWinRTScreen;
 class QWinRTInputContext : public QPlatformInputContext
 {
diff --git a/src/plugins/platforms/winrt/qwinrttheme.cpp b/src/plugins/platforms/winrt/qwinrttheme.cpp
index 7d09551f5b..7ef13fd0aa 100644
--- a/src/plugins/platforms/winrt/qwinrttheme.cpp
+++ b/src/plugins/platforms/winrt/qwinrttheme.cpp
@@ -56,6 +56,8 @@ using namespace ABI::Windows::UI::ViewManagement;
 
 QT_BEGIN_NAMESPACE
 
+Q_LOGGING_CATEGORY(lcQpaTheme, "qt.qpa.theme")
+
 static IUISettings *uiSettings()
 {
     static ComPtr<IUISettings> settings;
@@ -285,12 +287,14 @@ QWinRTTheme::QWinRTTheme()
     : d_ptr(new QWinRTThemePrivate)
 {
     Q_D(QWinRTTheme);
+    qCDebug(lcQpaTheme) << __FUNCTION__;
 
     nativeColorSettings(d->palette);
 }
 
 bool QWinRTTheme::usePlatformNativeDialog(DialogType type) const
 {
+    qCDebug(lcQpaTheme) << __FUNCTION__ << type;
     static bool useNativeDialogs = qEnvironmentVariableIsSet("QT_USE_WINRT_NATIVE_DIALOGS")
             ? qEnvironmentVariableIntValue("QT_USE_WINRT_NATIVE_DIALOGS") : true;
 
@@ -301,6 +305,7 @@ bool QWinRTTheme::usePlatformNativeDialog(DialogType type) const
 
 QPlatformDialogHelper *QWinRTTheme::createPlatformDialogHelper(DialogType type) const
 {
+    qCDebug(lcQpaTheme) << __FUNCTION__ << type;
     switch (type) {
     case FileDialog:
         return new QWinRTFileDialogHelper;
@@ -314,6 +319,7 @@ QPlatformDialogHelper *QWinRTTheme::createPlatformDialogHelper(DialogType type)
 
 QVariant QWinRTTheme::styleHint(QPlatformIntegration::StyleHint hint)
 {
+    qCDebug(lcQpaTheme) << __FUNCTION__ << hint;
     HRESULT hr;
     switch (hint) {
     case QPlatformIntegration::CursorFlashTime: {
@@ -363,6 +369,7 @@ QVariant QWinRTTheme::styleHint(QPlatformIntegration::StyleHint hint)
 const QPalette *QWinRTTheme::palette(Palette type) const
 {
     Q_D(const QWinRTTheme);
+    qCDebug(lcQpaTheme) << __FUNCTION__ << type;
     if (type == SystemPalette)
         return &d->palette;
     return QPlatformTheme::palette(type);
diff --git a/src/plugins/platforms/winrt/qwinrttheme.h b/src/plugins/platforms/winrt/qwinrttheme.h
index 2e159cbd55..e1a0e14964 100644
--- a/src/plugins/platforms/winrt/qwinrttheme.h
+++ b/src/plugins/platforms/winrt/qwinrttheme.h
@@ -39,9 +39,12 @@
 
 #include <qpa/qplatformtheme.h>
 #include <qpa/qplatformintegration.h>
+#include <QtCore/QLoggingCategory>
 
 QT_BEGIN_NAMESPACE
 
+Q_DECLARE_LOGGING_CATEGORY(lcQpaTheme)
+
 class QWinRTThemePrivate;
 class QWinRTTheme : public QPlatformTheme
 {
diff --git a/src/plugins/platforms/winrt/qwinrtwindow.cpp b/src/plugins/platforms/winrt/qwinrtwindow.cpp
index 034879c478..07904ffbf7 100644
--- a/src/plugins/platforms/winrt/qwinrtwindow.cpp
+++ b/src/plugins/platforms/winrt/qwinrtwindow.cpp
@@ -69,6 +69,8 @@ using namespace ABI::Windows::UI::Xaml::Controls;
 
 QT_BEGIN_NAMESPACE
 
+Q_LOGGING_CATEGORY(lcQpaWindows, "qt.qpa.windows");
+
 static void setUIElementVisibility(IUIElement *uiElement, bool visibility)
 {
     Q_ASSERT(uiElement);
@@ -101,6 +103,7 @@ QWinRTWindow::QWinRTWindow(QWindow *window)
     , d_ptr(new QWinRTWindowPrivate)
 {
     Q_D(QWinRTWindow);
+    qCDebug(lcQpaWindows) << __FUNCTION__ << this;
 
     d->surface = EGL_NO_SURFACE;
     d->display = EGL_NO_DISPLAY;
@@ -161,6 +164,7 @@ QWinRTWindow::QWinRTWindow(QWindow *window)
 QWinRTWindow::~QWinRTWindow()
 {
     Q_D(QWinRTWindow);
+    qCDebug(lcQpaWindows) << __FUNCTION__ << this;
 
     HRESULT hr;
     hr = QEventDispatcherWinRT::runOnXamlThread([d]() {
@@ -187,6 +191,8 @@ QWinRTWindow::~QWinRTWindow()
     if (!d->surface)
         return;
 
+    qCDebug(lcQpaWindows) << __FUNCTION__ << ": Destroying surface";
+
     EGLBoolean value = eglDestroySurface(d->display, d->surface);
     d->surface = EGL_NO_SURFACE;
     if (value == EGL_FALSE)
@@ -214,12 +220,15 @@ bool QWinRTWindow::isExposed() const
 void QWinRTWindow::setGeometry(const QRect &rect)
 {
     Q_D(QWinRTWindow);
+    qCDebug(lcQpaWindows) << __FUNCTION__ << this << rect;
 
     const Qt::WindowFlags windowFlags = window()->flags();
     const Qt::WindowFlags windowType = windowFlags & Qt::WindowType_Mask;
     if (window()->isTopLevel() && (windowType == Qt::Window || windowType == Qt::Dialog)) {
-        QPlatformWindow::setGeometry(windowFlags & Qt::MaximizeUsingFullscreenGeometryHint
-                                     ? d->screen->geometry() : d->screen->availableGeometry());
+        const QRect screenRect = windowFlags & Qt::MaximizeUsingFullscreenGeometryHint
+                                    ? d->screen->geometry() : d->screen->availableGeometry();
+        qCDebug(lcQpaWindows) << __FUNCTION__ << "top-level, overwrite" << screenRect;
+        QPlatformWindow::setGeometry(screenRect);
         QWindowSystemInterface::handleGeometryChange(window(), geometry());
     } else {
         QPlatformWindow::setGeometry(rect);
@@ -243,6 +252,8 @@ void QWinRTWindow::setGeometry(const QRect &rect)
         Q_ASSERT_SUCCEEDED(hr);
         hr = frameworkElement->put_Height(size.height());
         Q_ASSERT_SUCCEEDED(hr);
+        qCDebug(lcQpaWindows) << __FUNCTION__ << "(setGeometry Xaml)" << this
+                             << topLeft << size;
         return S_OK;
     });
     Q_ASSERT_SUCCEEDED(hr);
@@ -251,6 +262,8 @@ void QWinRTWindow::setGeometry(const QRect &rect)
 void QWinRTWindow::setVisible(bool visible)
 {
     Q_D(QWinRTWindow);
+    qCDebug(lcQpaWindows) << __FUNCTION__ << this << visible;
+
     if (!window()->isTopLevel())
         return;
     if (visible) {
@@ -272,6 +285,7 @@ void QWinRTWindow::setWindowTitle(const QString &title)
 void QWinRTWindow::raise()
 {
     Q_D(QWinRTWindow);
+    qCDebug(lcQpaWindows) << __FUNCTION__ << this;
     if (!window()->isTopLevel())
         return;
     d->screen->raise(window());
@@ -280,6 +294,7 @@ void QWinRTWindow::raise()
 void QWinRTWindow::lower()
 {
     Q_D(QWinRTWindow);
+    qCDebug(lcQpaWindows) << __FUNCTION__ << this;
     if (!window()->isTopLevel())
         return;
     d->screen->lower(window());
@@ -299,6 +314,8 @@ qreal QWinRTWindow::devicePixelRatio() const
 void QWinRTWindow::setWindowState(Qt::WindowState state)
 {
     Q_D(QWinRTWindow);
+    qCDebug(lcQpaWindows) << __FUNCTION__ << this << state;
+
     if (d->state == state)
         return;
 
diff --git a/src/plugins/platforms/winrt/qwinrtwindow.h b/src/plugins/platforms/winrt/qwinrtwindow.h
index 9ac7adbf4d..36f5b9de84 100644
--- a/src/plugins/platforms/winrt/qwinrtwindow.h
+++ b/src/plugins/platforms/winrt/qwinrtwindow.h
@@ -37,12 +37,15 @@
 #ifndef QWINRTWINDOW_H
 #define QWINRTWINDOW_H
 
+#include <QtCore/QLoggingCategory>
 #include <qpa/qplatformwindow.h>
 #include <qpa/qwindowsysteminterface.h>
 #include <EGL/egl.h>
 
 QT_BEGIN_NAMESPACE
 
+Q_DECLARE_LOGGING_CATEGORY(lcQpaWindows)
+
 class QWinRTWindowPrivate;
 class QWinRTWindow : public QPlatformWindow
 {