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Grub suddenly vanished on a Windows 8.1 UEFI Dual Boot installation

asked 2014-06-28 13:06:48 -0500

nukerider gravatar image

updated 2014-06-28 19:00:50 -0500

I had Grub installed and things were working great, but I was messing around with the BIOS settings (I had just found out how to enter a normal BIOS menu after booting up instead of going through Windows to get to it on my UEFI computer) and when I was done I quit without saving, but that must have reverted the settings back to the original settings, so now it boots directly into Windows 8. I'm still able to get at Fedora though, by going through Boot device options and selecting my Fedora partition. This brings me into Grub from which I can get into Fedora. While this works, I would like it to go straight to Grub. Is there any way to do that? I've tried booting into Fedora recovery mode but that didn't work and I've also tried using

grub2-install /dev/sda --target i386-pc

But tha results in the error message:

/usr/sbin/grub2-bios-setup: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
/usr/sbin/grub2-bios-setup: warning: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
/usr/sbin/grub2-bios-setup: error: will not proceed with blocklists.

Is there a way to get around this and get Grub back?

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answered 2014-06-29 23:54:01 -0500

updated 2014-07-01 07:47:57 -0500

Grub is not installed to the disk on UEFI systems, it lives on the UEFI partition. You're probably lucky that it returned an error; I've heard of some cases where making this mistake caused more problems than you have now.

You have: - A UEFI system with both Windows and Fedora - Windows boots by default - Fedora boots if manually selected from the UEFI boot menu

So, you need to change the boot order. You can do this in the system firmware menus, or using Fedora with the instructions I wrote in this post:

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@randomuser - Isn't that achievable through the 'Boot' section in the BIOS?

abadrinath gravatar imageabadrinath ( 2014-07-01 06:05:42 -0500 )edit

good call, edited.

randomuser gravatar imagerandomuser ( 2014-07-01 07:46:39 -0500 )edit

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Asked: 2014-06-28 13:06:48 -0500

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Last updated: Jul 01 '14