title: raspbian qt virtual keyboard black top screen
body: <p>I run Qt Virtual Keyboard example in ubuntu and windows 10 very nice, but on raspbian it runs just on full screen mode and i can not see text edit when typing with virtual keyboard. I want virtual keyboard width fit to window size and show under the text edit. How ?</p>
  
  <pre><code>import sys
  import os
  from PySide2.QtWidgets import *
  
  os.environ["QT_IM_MODULE"] = "qtvirtualkeyboard"
  
  app = QApplication([])
  w = QWidget()
  vl = QVBoxLayout(w)
  btn = QPushButton()
  btn.setText('Start')
  vl.addWidget(btn)
  tb = QLineEdit()
  vl.addWidget(tb)
  
  w.show()
  sys.exit(app.exec_())
  </code></pre>
  
  <p>result on windows 10:</p>
  
  <p><a href="https://i.stack.imgur.com/xo8E9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xo8E9.png" alt="enter image description here"></a></p>
  
  <p>but on raspbian it look like:</p>
  
  <p><a href="https://i.stack.imgur.com/eJUjm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eJUjm.png" alt="enter image description here"></a></p>
  
  <p>how can i solve it? 
  please help</p>