On 2022-05-24, Nick Holland <nick@holland-consulting.net> wrote:
> On 5/24/22 6:28 PM, Gustavo Rios wrote:
>> May some one here suggest a documentation the explains this scenario ? I am
>> in needof this.
>>
>> Thanks in advance!
>
> I've actually been experimenting with the UEFI OpenBSD and Windows combo,
> though I suspect it is applicable to Linux, as well.
>
> Warning: I'm trying to avoid GRUB as my boot selector. UEFI is supposed
> to be able to do this for us. So I would rather just use it. I don't
> trust grub to do anything other than Windows and Linux (which is just
> Windows re-invented badly).
>
> Short version: wow...there's a lot variety out there on machines. If you
> want one answer for all hardware, that's not gonna happen. :-/
> That's about the only certainty I have at this point. Many UEFI systems
> are only designed to boot Windows it seems, the idea of multiple OSs on
> one disk didn't occur to some people..
rEFInd works pretty well - it's just a boot manager and still uses the
standard OS boot loader to boot the kernel. I didn't like the icons so set
it to "textonly", with it set to autoboot OpenBSD after a short timeout,
which I found much more convenient than the built-in boot manager on the
machine I wanted to dual-boot. Good information about the EFI boot process
(and especially about CSM) on the website - https://www.rodsbooks.com/refind/
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