Ubuntu 12.04 Kernel Parameters for the Low Energy Server

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To use Ubuntu 12.04 LTS on the Low Energy Server it is necessary to adjust some Kernel parameters (to be able to shutdown or reboot the server, and to solve graphic driver issues).

Required Kernel parameters for Kernel 3.2

The required Kernel parameters for Kernel 3.2 are:

acpi=force reboot=acpi psb_gfx.blacklist=yes

When these settings are set during installation of Ubuntu 12.04.1 (using F6), the Ubuntu installer sets the acpi options in /etc/default/grub and adds a blacklist-entry in /etc/modprobe.d/blacklist.local.conf (blacklist psb_gfx).

Required Kernel parameters for Kernel 3.5

The required Kernel parameters for Kernel 3.5 (Ubuntu 12.04.2 LTS Enablement Stack) are:

acpi=force reboot=acpi gma500_gfx.blacklist=yes

When these settings are set during installation of Ubuntu 12.04.2 or newer (using F6), the Ubuntu installer sets the acpi options in /etc/default/grub and adds a blacklist-entry in /etc/modprobe.d/blacklist.local.conf (blacklist gma500_gfx).

Setting the Kernel parameter permanently

  1. Open the Grub configuration file in an editor, e.g. vi:
    sudo vi /etc/default/grub
  2. Edit the following line and save the configuration file:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi=force reboot=acpi psb_gfx.blacklist=yes" (for Kernel 3.2)
    GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi=force reboot=acpi gma500_gfx.blacklist=yes" (for Kernel 3.5)
  3. Update the Grub boot loader using the following command:
    sudo update-grub

Further Information

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