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

[Eric van der Vlist]

Of course, I have to update grub.cfg through update-grub.

What I was trying to explain is that when I do so I can't boot but when
I provide the same kernel options through a manual update these options
do not work!

In other words, I have manually updated grub.cfg as a workaround to be
able to use this machine and as a way to show that the kernel is OK with
these options.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
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?

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/997270/+subscriptions