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

[M Griffin]

I'm dual-booting Windows 10 and Kubuntu 16.10 and I had the issue with
the grub2 config file having a 10 second timeout then defaulting to 30
seconds upon boot.

I tried the workaround in post #8 which then caused my boot menu to be completely hidden. I then removed both files described in the workaround and removed the GRUB_HIDDEN_TIMEOUT value and ran sudo update-grub which seemed to have fixed my problem. 
I have also had hibernation enabled for some time as noted in the GRUB_CMDLINE_LINUX_DEFAULT "resume=UUID=xxxxx" (swap partition) argument. I find hibernation extremely useful with laptops (I've removed the UUID for security reasons)


# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=UUID=xxxxx"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

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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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