title: How to configure minigui with qvfb?
body: <p>I just came across an issue with running minigui example.
  I download qt-4.8.6 and install correctly on my Ubunut 14.04.
  I can run qvfb without any problems, but when I want to run housekeeper (an example from minigui) something wrong happen:  </p>
  
  <pre><code>start-qvfb :/opt/Qt-x11-4.8.6/bin/qvfb pcxvfb 3351 XVFB-for-MiniGUI-3.0-(Gtk-Version) 800x600-16bpp 
  Unknown parameter 3351
  Usage: pcxvfb [-width width] [-height height] [-depth depth] [-zoom zoom][-mmap] [-nocursor] [-qwsdisplay :id] [-x11display :id] [-skin skindirectory]
  Supported depths: 1, 4, 8, 12, 15, 16, 18, 24, 32
  NEWGAL&gt;PCXVFB: Wait too long for CLIENT.
  NEWGAL: Does not find matched engine: pc_xvfb.
  KERNEL&gt;InitGUI: Can not get graphics engine information!
  </code></pre>
  
  <p>What should I do?</p>