Bug#741342: /usr/sbin/update-grub: update-grub writes root=UUID= to grub.cfg for LVM2, renders machine unbootable

[gregor herrmann]

On Tue, 11 Mar 2014 14:43:53 +0200, Modestas Vainius wrote:

> update-grub writes root=UUID=xxxxxx for LVM2 volumes to kernel command line.
> This renders the system unbootable since it is not supported as far as I can tell.

Confirmed (not the "unbootable" part, since I found this bug report
before :))

> Hence, if I replace root=UUID=af89a290-9c6f-4039-8d5c-95aa75654776 with
> root=/dev/mapper/mdxinventi-root, the system boots fine.

Updating /etc/default/grub helped for me:

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
GRUB_DISABLE_LINUX_UUID="true"

(and re-running update-grub2) 


Cheers,
gregor

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