[Bug 577120] Re: Grub 2 long delay while loading Ubuntu kernel

[Keith Baker]

The same happens to me. The delay between selecting a kernel and first
boot messages is about 5 seconds. However if I select the windows boot
entry, there's no such delay. The windows 7 icon shows immediately.

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https://bugs.launchpad.net/bugs/577120

Title:
  Grub 2 long delay while loading Ubuntu kernel

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: grub2

  After GRUB2 is loaded, I select Lucid Lynx and hit enter (it does not
  matter which kernel). It then takes roughly 40 seconds before the
  system starts to boot, while the screen remains dark during this time
  with no activity from the HD.

  This is a 64-bit fresh install of 10.04 on an external USB drive
  (although the issue was also present at an upgrade installation from
  9.10).

  See attached files for System info.

  There are no messages apparent in dmesg, kernel.log, or any other
  logs, as they do not begin to register any activity until after the 40
  seconds have passed.

  Further investigation has revealed the issue to be related to the time
  it takes GRUB to run the "linux" and "initrd" commands (13 and 25
  seconds, respectively). Please consult the following videos:

  http://www.youtube.com/watch?v=cUnc2iBeXmw (normal startup)
  http://www.youtube.com/watch?v=aMrjorH3gmU (debug startup)
  http://www.youtube.com/watch?v=00zGomqwrQM (custom grub - loaded from cd)
  http://www.youtube.com/watch?v=PsEjDvUVUNE (custom grub with debug on)

  This bug may be related to bug #451202 and bug #482927.

  As more and more onus is given to startup times, I feel this is
  something that needs to be looked at.

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