[Bug 1273764] Re: Grub ignores options on /etc/default/grub

[Edwin Pujols]

@psusi, Please look in /etc/grub.d/30_os-prober. In particular, the last
line reads:

> adjust_timeout

And the definition of `adjust_timeout` is:

> adjust_timeout () {
>  if [ "$quick_boot" = 1 ] && [ "x${found_other_os}" != "x" ]; then
>     cat << EOF
> set timeout_style=menu
> if [ "\${timeout}" = 0 ]; then
>   set timeout=10
> fi
> EOF
>   fi
> }

As you can see the `timeout` variable is set/reset to 10 (seconds).

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https://bugs.launchpad.net/bugs/1273764

Title:
  Grub ignores options on /etc/default/grub

Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  This is a fresh install of trusty (amd64), without proposed (since
  this grub package has reached the regular repos).

  I have attached my `/etc/default/grub` file. After modifying it, I
  make sure to run update-grub, but the changes won't take effect on
  next reboot: the menu is shown with a timeout of 10 seconds even when
  GRUB_TIMEOUT_STYLE is set to countdown.

  After reading grub.cfg and googling a bit I found this:

  https://gist.github.com/LeahCim/9332432

  (30_os-prober is overriding the values of GRUB_TIMEOUT and
  GRUB_TIMEOUT_STYLE.)

  Description:	Ubuntu Trusty Tahr (development branch)
  Release:	14.04

  grub-pc:
    Installed: 2.02~beta2-7
    Candidate: 2.02~beta2-7
    Version table:
   *** 2.02~beta2-7 0
          500 http://do.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

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