Dual Boot Windows EFI [SOLVED]

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tc682
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Dual Boot Windows EFI [SOLVED]

Post by tc682 »

Hi

I am just after some confirmation that I am on the right track. For the record I have set up several machines as single OS linux mint machines and am comfortable with setting up the partitions etc. I have not set up dual boot before.

I have a laptop (toshiba satellite A70) which has windows 8.1 currently installed. I wish to set it up with mint 18.1 cinnamon as a dual boot machine. I have shrunk the windows partition and have a sufficiently large space to set up Mint. I want to keep windows until I have worked out how to get a couple of specialised pieces of software I use for work to run in wine or virtual windows.

I can change the bios settings and successfully boot from a mint USB. The bios boot settings need to be changed back to boot from windows again.

When I run the "Install linux mint" program on the USB, it steps through and gets to the disk partition section. It DOES NOT ask to set up alongside windows and says that no operating system is identified on the computer. I assume this is just conflict between legacy and UEFI settings.

My question is, if I set up my own partitions at this point and install Mint (boot, swap, / and home partitions within my spare partitionable space), will it work as a dual boot machine? Are there any special things to look out for?

I am sure this is covered on the web somewhere but I am not sure of a reliable guide.
Last edited by tc682 on Mon Feb 13, 2017 8:59 pm, edited 1 time in total.

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MintyO
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Re: Dual Boot Windows EFI

Post by MintyO »

I think that if you want access to both systems without changing bios settings each time you want to switch, you should install Mint uefi mode too.

Edited to add: Here's a tutorial that should give you a good idea about the situation:
http://www.dedoimedo.com/computers/dual ... buntu.html
Ducks on the edge sleep with one eye open.

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Pierre
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Re: Dual Boot Windows EFI

Post by Pierre »

do have a look at this Tutorial, as well:
viewtopic.php?f=42&t=163126
it's written for win-8x, but does apply to win-10 as well.
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z31fanatic
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Re: Dual Boot Windows EFI

Post by z31fanatic »

The Fast Startup option may be on too. It means Windows never fully shuts down. The Linux installer will not see a Windows installation if fast startup is on.

To turn it off http://winaero.com/blog/how-to-disable- ... ndows-8-1/

tc682
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Re: Dual Boot Windows EFI

Post by tc682 »

Thanks everyone. I'll check those links and post a follow up.

I have switched off the fast boot options etc.

fabien85
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Re: Dual Boot Windows EFI

Post by fabien85 »

+1 on what has been said, you need windows and linux to have the same boot mode (i.e. UEFI if the laptop was shipped with windows 8 preinstalled)
Just a warning that fast boot is not the same as fast startup.
Fast boot is an option in the firmware/BIOS which skips verifying the integrity of the RAM for faster POST time. You can leave fast boot on if you want.
Fast startup is a windows option, which sort of hibernates windows instead of fully shutting it down. You NEED to turn this off. Follow z31fanatic's link to do this.

tc682
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Re: Dual Boot Windows EFI

Post by tc682 »

Success!

I shrank the windows partition (within windows) using the builtin disk manager.

I booted into linux from a USB, which succeded in UEFI mode.

This laptop has two hard drives installed and the mint installer wanted to install onto /dev/sda, which was the secondary/data drive in the old windows setup. I backed out of the install and made my own partitions on /dev/sdb for root, home and swap.

Re-running the installer I got to the "how do you want to install" page (which didn't recognise the windows operating system) and chose "Something else". I picked my partitions appropriately and installed. Made sure the boot option pointed to the windows boot partition.

It seems to be running now.

I hope this helps others and am happy to (try to) answer any questions.

Now - how do I change this topic to [SOLVED]?

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MintyO
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Re: Dual Boot Windows EFI

Post by MintyO »

tc682 wrote:.....

Now - how do I change this topic to [SOLVED]?
That's the easy part. :lol: Just edit the original post. Congrats!
Ducks on the edge sleep with one eye open.

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