CRUX Boot fails from Ubuntu Grub2

Steve Volumetric volumetricsteve at
Fri Jan 27 17:43:38 UTC 2017

If your goal is to dual boot, i might not be able to help you.  If you're
trying to just set up a bare-metal crux system, your grub install process
must be wonky, though, all I do is:
(appropriate fstab changes)
grub-install /dev/sda
(compile kernel, make modules_install, make firmware_install, cp
/boot/, cp arch/x86/boot/bzimage /boot/vmlinuz-1)
grub-mkconfig > /boot/grub/grub.cfg

I don't think I'm missing anything critical there as far as just being able
to boot is concerned...

On Fri, Jan 27, 2017 at 12:07 PM, Milton Smith <miltonsj at> wrote:

> I am using grub in Ubuntu because when I install grub in CRUX, I reboot to
> a grub rescue prompt and not a grub menu. It is very inconvenient. The UUID
> in stab just takes the place of where you put /dev/sdb, etc. Does that help
> clear it up? Thanks
> On Fri, Jan 27, 2017 at 10:56 AM, Steve Volumetric <
> volumetricsteve at> wrote:
>> How or more importantly why are you using Ubuntu's grub2 in crux?
>> Is it an EFI system?  I'm not sure what you mean by UUID in the context
>> of fstab, I almost always have something like:
>> /dev/sdb1   /    ext4   defaults,noatime(or whatever)   0   1
>> I wouldn't recommend using utilities for a different distrobution, crux
>> comes with grub2.
>> -vsteve
>> On Fri, Jan 27, 2017 at 11:42 AM, Milton Smith <miltonsj at>
>> wrote:
>>> I am trying to boot from the Grub that comes standard with an Ubuntu
>>> installation. I am installing on bare metal. I did compile my root
>>> filesystem into the kernel. I am using ext4. I did setup fstab with the
>>> uuid of the CRUX partition. Sorry for the confusion.
>>> Sent from BlueMail <>
>>> On Jan 27, 2017, at 9:55 AM, Steve Volumetric <volumetricsteve at>
>>> wrote:
>>>> I have a few questions, but first, what is "ubuntu grub2"?  Are you
>>>> installing on a VM or bare metal?
>>>> Did you compile your root file system into your kernel?  What file
>>>> system are you using on your root file system?  Did you set up fstab?
>>>> -vsteve
>>>> On Fri, Jan 27, 2017 at 10:46 AM, Milton Smith <miltonsj at>
>>>> wrote:
>>>>> Everytime I try to boot CRUX from Ubuntu's Grub2 it fails with a
>>>>> kernel panic.
>>>>> It gives me the error message, " unable to mount root filesystem on
>>>>> unknown block (0,0)".
>>>>> Can someone help me with this? Thanks!
>>>>> Sent from BlueMail <>
>>>>> ______________________________ _________________
>>>>> CRUX mailing list
>>>>> CRUX at
> --
> Milton Smith
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