title: Preview in AUCTex problem
body: <p>I'm trying to use emacs+auctex to write my internship report. But I found that the preview feature doesn't work.
  In fact I have made it work when using ubuntu 10.04, but now I have a new computer with 11.04 and I have problems with preview.</p>
  
  <p>For example:</p>
  
  <pre><code>\documentclass{article}
  \begin{document}
   Hello world!
  \end{document}
  </code></pre>
  
  <p>Then I hit C-c C-p C-b for a buffer-wide preview, it tells me:</p>
  
  <pre><code>error in process sentinel: preview-reraise-error: LaTeX found no preview images
  error in process sentinel: LaTeX found no preview images
  </code></pre>
  
  <p>Then in the info output file, it tells me</p>
  
  <pre><code>Preview: Fontsize 10pt )  !name(hello world.tex) !offset(-3)  ) No pages of output. Transcript written on _region_.log.
  
  Preview-LaTeX finished with nothing to show at Fri Jul 22 22:45:58 LaTeX: LaTeX found no preview images
  </code></pre>
  
  <p>Compiling and other things work well, and I have tried some time re-installing auctex, but still like this.
  Any help?</p>
  
  <p>Thanks!</p>