I am trying to install Ubuntu 12.04 on a home made system with a gigabyte 990Fxa MB. I can make it through the install process. It does not boot. Windows 7 does boot on the same machine. Suse 11.4 boots on the same machine. Suse 12.4 does not boot. I think there may be an issue with the EFI / GPT system. I know very little about these systems. I really expected the machine to boot. What can I do to get the system to boot? Please direct me to a path to trouble shoot this problem.



  • does the system boot while using a live CD? Jun 6, 2012 at 12:34
  • If Rod's advice helped, please click the checkmark to accept it.
    – Krista K
    Jun 19, 2012 at 21:18

3 Answers 3


You'll need to do some troubleshooting of the boot process, beginning with two related questions:

  • Is the computer's firmware attempting to start the boot process in BIOS mode or in EFI mode? (Either is possible on most modern EFI-enabled machines.)
  • Did the problem OS(es) install BIOS-mode or EFI-mode boot loaders?

Basically, the boot loader installed by the OS must match the boot mode used by the motherboard. If they don't match, the system won't boot. Unfortunately, the EFI specification includes no standardized rules for determining the boot mode used by the computer, so manufacturers have been free to make up their own rules. These manufacturer-specific rules vary from one product to another and are seldom well-documented, so you may end up having to run experiments to figure out how to coax your board into booting in one mode or the other.

Generally speaking, if the computer boots Windows 7, the easiest course of action is to install Linux in a way that's compatible -- that is, in EFI mode if Windows is booting in EFI mode, and in BIOS mode if Windows already boots in BIOS mode. You can determine your Windows boot mode in various ways, such as by looking at the partition table -- if Windows is booting from an MBR disk, it's booting in BIOS mode, and if it's booting from a GPT disk, it's booting in EFI mode. See here for more details.

Fortunately, switching the Linux boot mode is usually just a matter of uninstalling the non-functional boot loader installing a suitable boot loader in its place. For Ubuntu, grub-pc is the usual BIOS-mode boot loader and grub-efi is the usual EFI-mode boot loader; but in my experience, GRUB's EFI version is pretty flaky, so I personally prefer to use others. Switching out the Linux boot loader may require using an emergency boot disk. See my Web page on the topic for a more thorough coverage of this topic.


Wild guess is that your new mothedoard BIOS support's UEFI. Whit EFI / UEFI you have booting point at motherboard memory and you get that easyly lost :

-After doing FRESH install you must also UPDATE starting location to motherboard memory ,you might forget to do that or installation script dose not note that!

-updateing BIOS will clear out EFI startup info as well.

-editing EFI BIOS SETTINGS can cause same !!!

At Ubuntu 12.4 precise simply BOOT computer WHIT UEFI whit your LIVE-CD, RESCUE DISK/STICK/USB and go repair mode.

You must get your self loged in / chrooted to your hard disk and then reinstall EFI booting information to system memory as well update HARDDISK information as well.

You need startup code (at my system /sda) at starup hardisk loacated at /boot/efi and whit my configuration mounting goes like this:

mount /dev/sda /boot/efi

So you got mounted booting part needed by grub-efi program to system for reinstallation.

Just then to update motherboard UEFI memory settings as well harddisk whit grub-efi run:

apt-get install --reinstall grub-efi-amd64


apt-get install --reinstall grub-efi

This should do all needed work (memory, harddisk) things and then just reboot!!!

MORE: http://www.thinkwiki.org/wiki/UEFI_Firmware https://help.ubuntu.com/community/UEFIBooting


When you make your bootable linux flash drive, make it on a windows computer. Then the gigabyte will boot from it and install just fine.

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