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

[Phillip Susi]

Well, I was thinking this was just a buggy video device that needed
added to the grub gfx blacklist but now I don't know...


** Changed in: grub2 (Ubuntu)
       Status: Incomplete => New

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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:
  New

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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