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[UEFI] Gentoo with UEFI (Open)
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ZaPa
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PostPosted: Sun Aug 16, 2015 11:02 am    Post subject: [UEFI] Gentoo with UEFI (Open) Reply with quote

Hello.

I just bought a new computer comes with Windows 8 installed and the famous UEFI.

I've been looking for a few days to perform a Gentoo installation using UEFI but there are certain things that I can not understand very well about gentoo.

In the gentoo handbook states that only has to download the minimal live cd and burn it to boot on a computer with UEFI. Nope unfortunately UEFI enabled, disabled CSFM and Secure Boot enabled, at the prompt to boot the live cd cd gentoo or appears. Not to mention that from my point of view the documentation in the handbook on UEFI is incomplete ...

If I disable Secure Boot and active CSM if it appears, but there are teams that do not allow for this change.

Then (and leaving all options by default, Secure boot enabled, UEFI, etc ...) downloaded ubuntu, I burn the iso image to a DVD without any problem I can boot with it.

According to some sites gentoo documentation, to boot smoothly with UEFI teams must use a distribution called 'RescueCD' and I wonder ... Why get ubuntu to make it work all your cd / dvd and gentoo we have to use other distribution? Not understand it.

Also mention a startup called refind manager for dual booting, when Ubuntu get it done only with GRUB 2, is not it ?. If possible do only with grub2 to complicate things?


I hope to help.
Regards.
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Keruskerfuerst
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Joined: 01 Feb 2006
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PostPosted: Sun Aug 16, 2015 12:56 pm    Post subject: Reply with quote

You can use the Systemrescuecd here: http://www.sysresccd.org/Download

This should work.
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ct85711
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Joined: 27 Sep 2005
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PostPosted: Sun Aug 16, 2015 5:23 pm    Post subject: Reply with quote

In short, the Gentoo's minimal cd does not support booting in UEFI (which is needed to setup grub properly for UEFI). However, you can quite well use Grub2 and dual boot with UEFI without having refind at all. Personally, I've had numerous troubles using refind, so I don't even bother with it.

Now, the documentation may not explain this as clear, but you can use any distribution's bootcd to install Gentoo (actually is the recommended way too). Reguardless of which distribution's cd you use, it doesn't change the install process nor does that have any effect on the gentoo system. The main thing the other linux boot cd's provide is a GUI (so you can open a browser, to have the documentation open) and also ensures the UEFI variables is initialized (booted in UEFI mode) so grub can do it's configuration.
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ZaPa
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Joined: 13 Feb 2007
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PostPosted: Sun Aug 16, 2015 5:43 pm    Post subject: Reply with quote

Thanks for your answers and clarifications.

If you knew that you can make a gentoo install from any other distribution.

But my question is simple. Why not incorporate gentoo UEFI boot in its minimal live cd? The way for new users who want to try gentoo be facilitated. I do not understand this position not include UEFI minimal live cd.

I can not understand how to install a Linux distribution have to use another.


Thank you.
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ZaPa
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PostPosted: Sun Aug 16, 2015 6:05 pm    Post subject: Reply with quote

Just I try the live CD and live DVD systemrescue gentoo. With secure boot enabled this message appears:

Secure Boot
'Invalid signature detected. Check secure boot policy in Setup '

Disable secure boot configuration and it works perfect.

Are not you can boot with gentoo secure boot enabled? I tested with Ubuntu Live DVD with secure boot and boot without problems.

A greeting.
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Darth Marley
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Joined: 25 Jan 2007
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PostPosted: Sun Aug 16, 2015 9:20 pm    Post subject: Reply with quote

This should answer all your questions and troubles: https://wiki.gentoo.org/wiki/Sakaki's_EFI_Install_Guide
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