title: Is /usr/src directory related to the booting of Linux kernel in any way? If yes, how?
body: <p>Specifically, I was running Ubuntu 10.04 (Lucid Lynx), and accidentally mounted an empty device (partition) at /usr/src. I forgot to unmount the empty device and on rebooting Ubuntu greets me with a message similar to the following:</p>
  
  <blockquote>
    <p>"Ubuntu will now start in low-graphics mode as it can't find the
    configuration for relevant drivers"</p>
  </blockquote>
  
  <p>And then it sits idle just like that, with a dark screen (after I click okay on the above dialog box). It also gives me an option to configure the options myself (which I am not comfortable doing).
  I am suspecting that this is related to /usr/src being empty as that is the only stupid thing I remember doing. Can somebody explain if this is really the case?</p>