title: Ubuntu 13.10 breaks NoMachine
body: <p>Twice since installing NoMachine a few years ago on Ubuntu, I've upgraded Ubuntu. And each time the upgrade broke NoMchine and I had to implement a workaround found on the web. So I wasn't surprised when I got around today to upgrading from Ubunto 12.10 to 13.10 that, once again, it broke NoMachine. But this time, I cań't find a solution after searching the web for a couple hours.</p>
  
  <p>The problem is that for some reason Ubuntu is unable to execute the fallback to GNOME classic (no effects), which NoMachine says is required. I followed the instructions on the NoMachine site for configuring NoMachine 4, which is to <code>sudo apt-get install gnome-session-fallback</code> and then insert <code>DefaultDesktopCommand "/etc/X11/Xsession gnome-session-fallback"</code> into the file <code>&lt;installationDirectory&gt;/NX/etc/node.cfg</code>.</p>
  
  <p>Before and after doing this, when I try to create a gnome session from a remote NoMachine client, I get the error message</p>
  
  <pre><code>Xsession: unable to launch "gnome-session-fallback" X session ---"gnome-session-fallback"
  not found: falling back to default session
  </code></pre>
  
  <p>And then it just displays a black screen.</p>
  
  <p>I tried using gnome-session-flashback per some comments on other forums, and that didn't help. I also tried using xfce4 instead of gnome. That brings up a desktop, but then the client Seg Faults as soon as I try to interact with the desktop.</p>