On Fri, Aug 13, 2010 at 11:07 AM, Simon Brandmair <sbrandm...@gmx.net> wrote:
>
> I upgraded grub to grub2 (squeeze) and at first I couldn't boot my linux
> kernel (2.6.32), which work fine with the old grub. The boot process
> stopped with the following messages: "VFS: Unable to mount root fs on
> unknown-block(0,0)".
>
> After some research, I figured that the root fs is not set correctly in /
> boot/grub/grub.cfg. The root fs was defined with a uuid string, which I
> confirmed as correct. After altering the uuid string to /dev/sda2, linux
> would boot normally.
>
> Since grub.cfg is not supposed to be edited, I added to /etc/default/grub
> (thanks to https://help.ubuntu.com/community/Grub2):
> # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to
> # Linux
> GRUB_DISABLE_LINUX_UUID="true"
>
> and then ran `update-grub`.
>
> I thought this might be helpful for others running into the same problem.
> Also, any idea why the (again: correct) uuid string didn't work? I have
> two other systems with a similar set-up and defining the root fs with uuid
> works just fine.
Please post the output of "blkid -c /dev/null" and the working grub2
"menuentry ... { ... }".
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