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Re: grub.cfg does not have luks module for encrypted root

From: Joshua Branson
Subject: Re: grub.cfg does not have luks module for encrypted root
Date: Sun, 03 Feb 2019 13:16:52 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

swedebugia <address@hidden> writes:

> Joshua Branson <address@hidden> skrev: (2 februari 2019 14:50:17 CET)
>>Jack Hill <address@hidden> writes:
>>> On Fri, 1 Feb 2019, Joshua Branson wrote:
>>>> Jack Hill <address@hidden> writes:
>>>>> Ahoy,
>>>>> I'm using the attached config.scm for a host with an encrypted gpt
>>>>> root partition while booking with bios-grub. It produces the
>>>>> grub.cfg, which lacks the luks module, thus grub cannot find the
>>>>> kernel.
>>>>> If I enter the grub command line and manually insmod luks and
>>>>> cryptomount, I can then boot correction.
>>>> Out of curiosity how do you boot GuixSD on the grub command line?
>>>> The only way I know how to do it is:
>>>> set root=(hd0,1)  ; wherever your root partition is
>>>> linux /gnu/path/to/vmlinuz-linux-libre root=/dev/sda1
>>>> initrd /gnu/path/to/initramfs-linux-libre.img
>>>> boot
>>>> In arch linux, I know where those paths are: /boot, but it GuixSD
>>>> paths are usually buried in /gnu/some/crazy/path...
>>> Once I ran 'insmod luks' and 'crytomount (hd0,gpt2)', the filesystem
>>> containing the store became available to Grub. I then ran 'configfile
>>> (hd0,gpt1)/boot/grub/grub.cfg' to have Grub reprocess the config file
>>> that Guix wrote for it. Since the store was now available, Grub was
>>> able to load its theme, kernel, and initramfs. Sorry for admitting
>>> that step in my summary.
>>You're fine.  I was unaware of that command.  I actually didn't know
>>to boot guixSD, from grub's command prompt....
> I think this is a good thing to include in the manual. Maybe in a 
> troubleshooting section?

That would be a fine thing to include indeed!  

Joshua Branson
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