install f22 into btrfs subvolume won't boot

[Chris Murphy]

On Thu, May 28, 2015 at 1:32 PM, Neal Becker <ndbecker2 at gmail.com> wrote:
> Neal Becker wrote:

> the rescue, which DOES work, says:
>
>         linux16 /vmlinuz-0-rescue-39e9e51995d040a88bf6f0ae625ead80
> root=UUID=7246327b-1905-4fe2-9b6b-b9376017264f ro rootflags=subvol=root00
> rhgb quiet
>
>
> the default, which does NOT work, says:
>         linux16 /vmlinuz-4.0.4-301.fc22.x86_64 root=/dev/sdb8 ro
> rootflags=subvol=root00 rhgb quiet LANG=en_US.UTF-8
>
>
> I did see an error about not finding /dev/sdb8 - I think that's the problem.

There's a GRUB related bug where for some reason in certain instances
root=/dev/ is used instead of root=UUID=<uuid> and I'm spacing out why
this happens. But the usual fix is to get it to boot manually somehow,
and then recreate the grub.cfg from scratch with grub2-mkconfig - and
invariably that one will have all entries  using UUID rather than
/dev/

-- 
Chris Murphy