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I have Windows 8.1, Ubuntu 14.04.2 and Ubuntu 14.10 on my machine. After installing the last, the GRUB is not showing the first two Operation Systems. I have try to fix this using Boot Repair but the Recommended Repair option did not fix the issue.

I have generated a Boot-info Summary since using advanced options of Boot Repair without understanding them could cause more problems.

Here is the full report and here is the initial part of it:

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  • do you have both primary and logical partitions on this disk? If so, I think the most likely culprit is that grub hasn't been installed to "/sda" (no number or anything after that....this ensures that grub is installed to the MBR of the primary disk on the system)
    – user175999
    Apr 19, 2015 at 7:37
  • @user175999 Could you tell what should I do?
    – gotqn
    Apr 19, 2015 at 7:44
  • I would convert the disks to GPT if your hardware can accommodate it. This way you can get rid of your extended partitions and have all primary partitions which will aid both windows and grub in finding all of your different operating systems that are installed.
    – user175999
    Apr 19, 2015 at 7:45
  • If you want to keep your current partition structure, I need to know how many total disks are in the machine. #2 I need to make sure you at least have a bootable Ubuntu install disk or USB stick
    – user175999
    Apr 19, 2015 at 7:47
  • I have one hard disk drive (2 TB) and I have Ubuntu on USB stick - I am currently working using it (Try Ubuntu option) - do you mean this askubuntu.com/questions/84501/…
    – gotqn
    Apr 19, 2015 at 7:48

1 Answer 1

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if you have a way to access at least one Ubuntu installation, the answer goes as follows:
1. log in using Ubuntu intallation
2. sudo apt-get update && sudo apt-get dist-upgrade
3. grub-install
4. update-grub

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  • (all commands need sudo first...easier way to input sudo password only once is... sudo -i (then enter sudo password and you don't have to type sudo every line))
    – user175999
    Apr 19, 2015 at 9:10
  • 1
    sudo grub-install ; Installing for i386-pc platform. ; grub-install: error: install device isn't specified.
    – James Newton
    Jul 6, 2015 at 22:24

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