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RoboGrinch
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PostPosted: Tue Jan 12, 2016 1:49 pm    Post subject: Duel Boot windows and Gentoo Reply with quote

Hi

I have a new alienware laptop. Its is UEFI and it has Windows 10...

I would like to also have Gentoo on this laptop in a Duel Boot enviroment... Is this possible?

What is the best practice to get this done?

Thanks
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RoboGrinch
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PostPosted: Tue Jan 12, 2016 2:02 pm    Post subject: Reply with quote

Is this as simple as shrinking the volume to free up space.

Then go through the install and grub will install the loader and add linux and windows?

This is how ubuntu did it but I understand gentoo is different.
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Fitzcarraldo
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PostPosted: Tue Jan 12, 2016 2:51 pm    Post subject: Reply with quote

There's an article in the Gentoo Wiki which you could follow (it covers Windows 10 too):

https://wiki.gentoo.org/wiki/UEFI_Dual_boot_with_Windows_7/8

[I have not tried dual booting Gentoo with Windows 10 and UEFI myself, only with earlier versions of Windows (XP and 7) and PC BIOS. I'm not suggesting you try the following, but, if I were going to have a go at dual booting Windows 10 with Gentoo and UEFI, I would try using EasyBCD again, as I did with earlier Windows versions. I would shrink the Windows 10 partition using Windows 10's Disk Management (I certainly would not use any Linux partitioning tools or commands to shrink the Windows 10 partition). I would then partition the freed space and install Gentoo, followed by installing the Windows utility EasyBCD -- Version 2.3 and above supports Windows 10 and UEFI according to the NeoSmart Web site -- and use EasyBCD to configure the Windows 10 BCD so that Windows Boot Manager offers two options: boot Windows 10 or chainload GRUB (which would then boot Gentoo). That way I should still be able to boot Windows 10 even if I messed up the Gentoo partitions later.]
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Clevo W230SS: amd64 OpenRC elogind nvidia-drivers & xf86-video-intel.
Compal NBLB2: ~amd64 OpenRC elogind xf86-video-ati. Dual boot Win 7 Pro 64-bit.
KDE on both.

Fitzcarraldo's blog
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The Doctor
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PostPosted: Tue Jan 12, 2016 9:49 pm    Post subject: Reply with quote

Just be sure you back up your data, and free the space from Windows as MS can be easily annoyed if other tools mess with it. Also disable Windows fast boot. It messes with the computer in a way that may make linux fail to boot.

You might have to play around with secureBoot quite a bit, but it should be completely doable.
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Irre
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PostPosted: Wed Jan 13, 2016 8:08 am    Post subject: Reply with quote

I like the word "duel". :D Who is gonna win today. Is it Windows or is it Gentoo? :D
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cwr
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PostPosted: Wed Jan 13, 2016 10:56 am    Post subject: Reply with quote

What Fitzcarraldo said. I've found that Windows, especially on laptops with recovery partitions, can be pretty neurotic. I use EasyBCD and a separate boot partition, so once that's set up I can mess with the Linux installation as much as I want and booting to Grub (which I make the default Windows boot menu option) remains unchanged.

The second menu adds five or ten seconds to the boot time, but it makes life a great deal easier.

Will
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koschi
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PostPosted: Thu Jan 14, 2016 1:48 am    Post subject: Reply with quote

Fitzcarraldo wrote:
There's an article in the Gentoo Wiki which you could follow (it covers Windows 10 too):

https://wiki.gentoo.org/wiki/UEFI_Dual_boot_with_Windows_7/8

[...]


This guide works great. I just needed some time to understand what refind is doing. Finally I got rid of grub and everything works smoother than before (I migrated from bios/mbr to uefi/gpt).

Findings: When updating to Win10 1511 you need to re-activate refind afterwards since the update cripples it. Just follow the refind guide again. But since everything can be done from Win10 it's not a big deal.
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