title: I can not see my mouse when I use QEMU to open a Windows XP guest in an Ubuntu guest created by virtualbox on my MAC computer
body: <p>First on my MAC(OSX), I use virtualbox to create an Ubuntu guest. Then in Ubuntu, I use root to create a Windows XP guest using command:</p>
  
  <pre><code>./qemy-system-i386 -monitor stdio -m 512 -netdev user,id=mynet -device rtl8139,netdev=mynet &lt;Windows Image file&gt;
  </code></pre>
  
  <p>But after I got into Windows, I nearly can not see my mouse！ However, in the QEMU window, I have seen "QEMU Press Ctl-Alt to exit mouse grab", so it looks like it should have already grabbed the mouse correctly. But I can not see it.</p>