diff --git a/plugins/platforms/x11/windowed/scene_qpainter_x11_backend.cpp b/plugins/platforms/x11/windowed/scene_qpainter_x11_backend.cpp
--- a/plugins/platforms/x11/windowed/scene_qpainter_x11_backend.cpp
+++ b/plugins/platforms/x11/windowed/scene_qpainter_x11_backend.cpp
@@ -46,7 +46,7 @@
     for (int i = 0; i < screens()->count(); ++i) {
         Output *output = new Output;
         output->window = m_backend->windowForScreen(i);
-        output->buffer = QImage(screens()->size(i), QImage::Format_RGB32);
+        output->buffer = QImage(screens()->size(i) * screens()->scale(i), QImage::Format_RGB32);
         output->buffer.fill(Qt::black);
         m_outputs << output;
     }
diff --git a/plugins/platforms/x11/windowed/x11windowed_backend.cpp b/plugins/platforms/x11/windowed/x11windowed_backend.cpp
--- a/plugins/platforms/x11/windowed/x11windowed_backend.cpp
+++ b/plugins/platforms/x11/windowed/x11windowed_backend.cpp
@@ -127,10 +127,11 @@
             XCB_EVENT_MASK_STRUCTURE_NOTIFY |
             XCB_EVENT_MASK_EXPOSURE
         };
-        o.size = initialWindowSize();
+        o.scale = initialOutputScale();
+        o.size = initialWindowSize() * o.scale;
         if (!m_windows.isEmpty()) {
             const auto &p = m_windows.last();
-            o.internalPosition = QPoint(p.internalPosition.x() + p.size.width(), 0);
+            o.internalPosition = QPoint(p.internalPosition.x() + p.size.width() / p.scale, 0);
         }
         xcb_create_window(m_connection, XCB_COPY_FROM_PARENT, o.window, m_screen->root,
                         0, 0, o.size.width(), o.size.height(),
@@ -388,11 +389,11 @@
     QSize s = QSize(event->width, event->height);
     if (s != (*it).size) {
         (*it).size = s;
-        int x = (*it).internalPosition.x() + s.width();
+        int x = (*it).internalPosition.x() + (*it).size.width() / (*it).scale;
         it++;
         for (; it != m_windows.end(); ++it) {
             (*it).internalPosition.setX(x);
-            x += (*it).size.width();
+            x += (*it).size.width() / (*it).scale;
         }
         emit sizeChanged();
     }
diff --git a/scene_qpainter.cpp b/scene_qpainter.cpp
--- a/scene_qpainter.cpp
+++ b/scene_qpainter.cpp
@@ -253,7 +253,8 @@
     if (!pixmap->subSurface().isNull()) {
         p += pixmap->subSurface()->position();
     }
-    painter->drawImage(p, pixmap->image());
+
+    painter->drawImage(QRect(pos, pixmap->size()), pixmap->image());
     const auto &children = pixmap->children();
     for (auto it = children.begin(); it != children.end(); ++it) {
         auto pixmap = static_cast<QPainterWindowPixmap*>(*it);