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Re: Cannot boot from dual bios/uefi boot CD

From: Andrei Borzenkov
Subject: Re: Cannot boot from dual bios/uefi boot CD
Date: Tue, 22 Dec 2015 16:19:14 +0300

On Tue, Dec 22, 2015 at 3:13 PM, John Frankish
<address@hidden> wrote:
>>>> Yes, I have reproduced it now. The reason is, grub-mkrescue adds
>>>> commands to load all partition drivers to embedded config and if some of 
>>>> them
>>>> (or may be the last one) is missing it sets error indication.
>>>> Later grub misinterprets this error indication when loading normal
>>>> module; loading it manually succeeds (insmod normal; normal).
>>> If I add code to reset error indication before trying to load normal it 
>>> works.
>>>> So it still works for your purposes, albeit with manual workaround :)
>>> Indeed - but I could hardly make it available to others like this :)
>> For the record - it should be fixed in current GIT.
>> If you have chance to retest it would be good.
> Thanks for the update.
> The dual boot cd/iso I was working on used isolinux for legacy boot and grub2 
> for uefi boot.
> What I would like to do is to use grub2 for both legacy and uefi boot by 
> embedding the various grub modules as before (which would also test your fix).
> Is this (grub2 dual boot cd/iso) possible?

Of course. This is what grub-mkrescue does.

> Is there an explanation somewhere?

I though we have been there already last time, not?

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