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So here is the issue I am having. My BIOS boot mode is set to Legacy+UEFI and my Windows 8.1 installed as Legacy, however, when I try to install Ubuntu, it attempts to install as UEFI and doesn't detect windows and can't install GRUB properly. So I was wondering if there was a way to force Ubuntu to install as Legacy or if I need to completely reinstall everything.

Also, this is a custom built computer. The motherboard is an MSI Z87-GD65 Gaming motherboard.

Gui Imamura
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user262163
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  • Also, this is a custom built computer. The motherboard is an MSI Z87-GD65 Gaming motherboard. – user262163 Mar 26 '14 at 07:04
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    Welcome to Ask Ubuntu! The best way to add additional information to your question is by editing it, with the edit button. It is better visible that way, and comments are mainly for secondary, temporary purposes. Comments are removed under a variety of circumstances. Anything important to your question should be in the question itself. – Danatela Mar 26 '14 at 07:16

1 Answers1

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First, verify that Windows is booting in BIOS/CSM/legacy mode. Windows 8.1 booting in that mode is certainly plausible on a self-built computer, but you should be 100% certain of what you're dealing with.

Second, the simplest way to get Ubuntu to boot in BIOS/CSM/legacy mode is to remove the EFI boot loaders from the Ubuntu boot medium. If you're booting from a USB flash drive, deleting the EFI directory tree on the flash drive should do the trick. There's also a Mac-specific version which, ironically, is BIOS-only, so you could download and use that.

Rod Smith
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