[Bug 797544] Re: grub2 waits forever for keystroke before booting default OS. headless server. hang.

[Michal Suchanek]

4) you have a serial port

 # cat /etc/grub.d/03_serial 
#!/bin/sh

echo serial --unit=0 --speed=115200
echo terminal_input --append serial\; terminal_output --append serial

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https://bugs.launchpad.net/bugs/797544

Title:
  grub2 waits forever for keystroke before booting default OS.  headless
  server. hang.

Status in “grub2” package in Ubuntu:
  New

Bug description:
  Binary package hint: grub2

  After a seemingly-routine "apt-get update" on an Ubuntu 10.10  server, the machine hangs on boot. 
  It is sitting at the grub2 prompt, waiting in vain for someone to come along and press <enter>.

  I have tried two workarounds:

  ---------------------------------------------
  Edit /etc/grub.d/00_header to remove the check for recordfail in:

  make_timeout ()
  {
      echo "set timeout=1"
  }
  --------------------------------------------------------------------
  In /etc/default/grub set
   GRUB_HIDDEN_TIMEOUT=2
  ---------------------------------
  Then "sudo update-grub"

  Now I'm pretty dang stuck.  There is plenty of forum activity on this
  issue, but no true solutions.

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