Re: [gentoo-user] Gentoo as kvm guest with virtio

[hw]

Rich Freeman wrote:
> On Wed, Mar 9, 2016 at 12:41 PM, hw <hw@×××××.de> wrote:
>>
>> I'm stuck with 'Could not find the root block device
>> in UUID= ...' when trying to boot the guest.
>>
>> Is grub2 unable to work with virtio devices?
>>
>
> Are you sure that is a grub2 message?  It seems more likely that this
> is a message from the kernel (unless it is referring to the grub2 root
> - posting the entire error would probably help here, and I didn't
> realize grub2 even can find its root with a UUID assuming it actually
> can).  Does your kernel have virtio support enabled?  What initramfs
> are you using?  The problem could lie with either.  See if you can get
> the initramfs to give you a shell (usually this can be done with a
> kernel command line option) and see what block devices it can see (run
> blkid or such).

I think it is a message from the kernel, so I'm trying to figure out
which drivers need to be enabled for the kernel to see the virtio-disk.
There doesn't seem to be any information at all about what is needed.

 > If you're not using an initramfs then that is your problem.  You can't
 > use UUID to reference your root if you aren't using an initramfs.

I'm using one, though I'm compiling most/all of what I know that will be
needed in rather than using modules.  Something must still be missing,
and I don't what.  At least now I know that the kernel is missing
something.