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

[Wyllys Ingersoll]

Im having the opposite sort of problem.  On Ubuntu 20.04 with grub2 2.04
- I want the menu to display but only for GRUB_TIMEOUT seconds.  No
matter what settings I use, it always displays indefinitely and never
counts down.

If I set GRUB_TIMEOUT_STYLE="countdown", it will do the countdown and
never shows the menu as expected, but we want the menu AND the menu
timeout countdown.

Setting GRUB_RECORDFAIL_TIMEOUT makes no difference.

My system does boot from an LVM RAID boot partition, but I have several
other identical systems configured exactly the same way that do not have
this problem. It seems rather random.

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

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

Status in grub2 package in Ubuntu:
  Triaged
Status in grub2 source package in Vivid:
  Triaged

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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