[Bug 997270] Re: Kernel options not effective when added to /etc/default/grub

[Eric van der Vlist]

I have tried to be both precise and concise, sorry if I have not been
clear.

The grub.cfg in the bootinfo is the one that has been generated by
update-grub. It may look correct but  I get a black screen (before even
displaying the grub menu) when I boot the machine with it.

I have replaced it with the content included in my description as a way
to test the kernel options and as a workaround to boot the machine
(which I need up and running).

My /etc/default/grub is just below in the same bootinfo, but I can copy
it here (it's the default one where I have replaced "quiet splash" by
"console=tty1 acpi=off" in GRUB_CMDLINE_LINUX_DEFAULT):

=================== /mnt/boot-sav/sda1/etc/default/grub :

# 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=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="console=tty1 acpi=off"
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"
=================== /mnt/boot-sav/sda1/etc/default/grub

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https://bugs.launchpad.net/bugs/997270

Title:
  Kernel options not effective when added to /etc/default/grub

Status in “grub2” package in Ubuntu:
  Invalid

Bug description:
  After upgrading a fit-pc2 (http://www.fit-pc.com/web/fit-pc/fit-
  pc2-specifications/) from 10.04 to 12.04, I got a black screen at boot
  time (before hitting the grub menu).

  The root cause is probably due to a known issue with gma500_gfx
  drivers
  (https://wiki.ubuntu.com/HardwareSupportComponentsVideoCardsPoulsbo
  /#PSB-GFX_drivers) and after trying a few combination with a live USB
  key, I saw that I could boot with the options "acpi=off" and
  "console=tty1".

  Using boot-repair, I have added these options to
  "GRUB_CMDLINE_LINUX_DEFAULT" in /etc/default/grub (BootInfo available
  at http://paste.ubuntu.com/975929/) but still get a black screen.

  I am sure that these options work because when I replace the content
  of /boot/grub/grub.cfg by:

  +++++++++++++++++++++++++++++
  set root=(hd0,1)
  linux /vmlinuz root=/dev/sda1 ro acpi=off console=tty1
  initrd /initrd.img
  boot
  +++++++++++++++++++++++++++++

  the machine boots perfectly fine.

  Why are these options not taken into account when added to
  /etc/default/grub?

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