[Ubuntu Wiki] Update of "DebuggingKernelBoot" by jk-ozlabs

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The following page has been changed by jk-ozlabs:
http://wiki.ubuntu.com/DebuggingKernelBoot?action=diff&rev1=7&rev2=8

The comment on the change is:
Expand boot option editing section

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  == Boot Options ==
  When trying to capture relevant error messages that appear at boot it is often useful to boot with the '''quiet''' and '''splash''' options removed.  This will hopefully allow you to see any messages that come across your screen.  To edit boot option parameters, do the following:
  
-  1. Press 'Escape' key at the 3 second pause by Grub bootloader.
-  1. Then press 'e' (edit) on the buggy kernel entry, followed by 'e' again on the kernel line.
+  1. Boot the machine
+  1. Once the BIOS screen goes away, press the left shift key and hold it down. You should get the GRUB menu.
+  1. Navigate to the kernel entry you want to boot, and press 'e'
+  1. Select the line with the boot options on it (it should start with "linux" or "kernel") and press 'e' again.
   1. Then remove the '''splash''' and '''quiet''' keywords and press 'b' to boot.
  
  It's best if you can attach a log file which may have captured any messages you see.  If you are unable to capture a log file, a digital photo will work just as well.  As a last resort you can even copy messages down by hand.