title: How to restart gdm in ubuntu without being logged out
body: <p>How can I restart gdm or the xserver without logging out?
  Sometimes, there is a freeze and I just need to redraw. It rarely happens but when it does. My only options are</p>
  
  <ol>
  <li>/etc/init.d/gdm restart</li>
  <li>ctrl+alt+backspace</li>
  <li>switch to tty and restart</li>
  </ol>
  
  <p>all those options force my session to end.</p>
  
  <p>Any suggestions?</p>
  
  <p>Thanks</p>