I should add I've *never* used a UUID in fstab, and I'm not familiar with how/why someone would do that, maybe someone on the mailing list could chime in.  Personally, I'd avoid use of UUIDs if you know your root partition is 'sda1' or some such.  I'd also avoid ubuntu-anything but that's another matter entirely.

On Fri, Jan 27, 2017 at 12:07 PM, Milton Smith <miltonsj@gmail.com> 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@gmail.com> 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@gmail.com> 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.

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On Jan 27, 2017, at 9:55 AM, Steve Volumetric <volumetricsteve@gmail.com> 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@gmail.com> 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!

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Milton Smith