Merge remote-tracking branch 'origin/tqtc/lts-5.15.9' into tqtc/lts-5.15-opensourcev5.15.9-lts-lgpl5.15

Change-Id: Id7e59c8258165ebca9bcb552d5a4e9872d872232

1 files changed, 8 insertions, 1 deletions

diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index cb82857a..df2dcdaa 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -867,7 +867,14 @@ bool QWaylandWindow::createDecoration()
             QMargins m = frameMargins();
             subsurf->set_position(pos.x() + m.left(), pos.y() + m.top());
         }
-        sendExposeEvent(QRect(QPoint(), geometry().size()));
+        setGeometry(geometry());
+
+        // This is a special case where the buffer is recreated, but since
+        // the content rect remains the same, the widgets remain the same
+        // size and are not redrawn, leaving the new buffer empty. As a simple
+        // work-around, we trigger a full extra update whenever the client-side
+        // window decorations are toggled while the window is showing.
+        window()->requestUpdate();
     }
 
     return mWindowDecoration;