2 files changed, 2 insertions, 7 deletions
diff --git a/src/plugins/platforms/xcb/qxcbbackingstore.cpp b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
index e93b36cb99..366e043e98 100644
--- a/src/plugins/platforms/xcb/qxcbbackingstore.cpp
+++ b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
@@ -232,9 +232,6 @@ void QXcbShmImage::put(xcb_window_t window, const QPoint &target, const QRect &s
     Q_XCB_NOOP(connection());
 
     m_dirty = m_dirty | source;
-
-    xcb_flush(xcb_connection());
-    Q_XCB_NOOP(connection());
 }
 
 void QXcbShmImage::preparePaint(const QRegion &region)
@@ -314,10 +311,11 @@ void QXcbBackingStore::flush(QWindow *window, const QRegion &region, const QPoin
     Q_XCB_NOOP(connection());
 
     if (m_syncingResize) {
-        xcb_flush(xcb_connection());
         connection()->sync();
         m_syncingResize = false;
         platformWindow->updateSyncRequestCounter();
+    } else {
+        xcb_flush(xcb_connection());
     }
 }
 
diff --git a/src/plugins/platforms/xcb/qxcbwindow.cpp b/src/plugins/platforms/xcb/qxcbwindow.cpp
index 806f948cc2..81134ced49 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.cpp
+++ b/src/plugins/platforms/xcb/qxcbwindow.cpp
@@ -668,8 +668,6 @@ void QXcbWindow::show()
 
     m_screen->windowShown(this);
 
-    xcb_flush(xcb_connection());
-
     connection()->sync();
 }
 
@@ -1889,7 +1887,6 @@ void QXcbWindow::updateSyncRequestCounter()
 {
     if (m_usingSyncProtocol && (m_syncValue.lo != 0 || m_syncValue.hi != 0)) {
         Q_XCB_CALL(xcb_sync_set_counter(xcb_connection(), m_syncCounter, m_syncValue));
-        xcb_flush(xcb_connection());
         connection()->sync();
 
         m_syncValue.lo = 0;