title: xrandr can't find gamma on VirtualBox Ubuntu
body: <p>I have a fresh install of <code>Ubuntu 14 32-bit</code> guest on a <code>Windows</code> server host. As usual, the default resolution is so small that I'm not able to see any window in its entirety.</p>
  
  <p>My usual procedure is:</p>
  
  <ol>
  <li>Install <code>Guest Additions</code></li>
  <li>Install <code>DKMS</code></li>
  <li>Install the correct/up-to-date linux <code>headers</code></li>
  <li>Reboot, hope it's fixed, but if not       </li>
  <li>Use <code>gtf</code> to get a modeline</li>
  <li>Use <code>xrandr --newmode</code> and <code>xrandr --addmode</code></li>
  </ol>
  
  <p>However, after going through this process several times including re-installing Guest Additions, there is still only the 1 prohibitively small resolution available and <code>Auto-scale</code> is still greyed out from the VirtualBox toolbar.</p>
  
  <p><code>xrandr</code> tells me that it <code>Failed to get size of gamma for output default</code>. </p>
  
  <p>Do I need to edit some <code>X</code>-related configuration file or something? I saw an unconfirmed comment/solution on another forum to that effect, but I was not able to successfully follow that solution using the provided link (which was <a href="http://www.x.org/wiki/FAQVideoModes" rel="nofollow">http://www.x.org/wiki/FAQVideoModes</a>).</p>