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

[pelm]

I also seems to be affected by this. I don't know though if adding
GRUB_RECORDFAIL_TIMEOUT=1 or 0 to /etc/default/grub will fix it. Every
now and then (not always) grub menu shows up when booting. Which it
shouldn't do, I haven't any other os installed on the computer. No boot
failure has happened neither so I couldn't think of grub menu appearing
because of that. I'm using Ubuntu stock 20.04. Is there some problem
with grub which could lead to this behavior? And what is the best way to
fix grub menu randomly appearing at boot up?

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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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