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

[Phillip Susi]

Your paste shows grub.cfg, but not /etc/default/grub.  In your paste its
contents are also correct, but you claim you had to manually edit it to
get it that way, so the question is what does it look like after running
update-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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