Bug#591093: Grub2 needs manual configuration to boot Xen and LVM2

[Colin Watson]

tags 591093 fixed-upstream
thanks

On Sat, Jul 31, 2010 at 01:44:17PM -0700, Stuart Chalmers wrote:
> (dom0) System is set up with a single disk with both /boot and / (root) 
> contained within an LVM2 physical volume.
> 
> When Xen (xen-hypervisor-4.0-amd64 4.0.1~rc3-1 and linux-image-2.6.32-5-amd64 
> 2.6.32-15) and Grub are installed
> the following is automatically placed in/boot/grub/grub.cfg for the Xen menu 
> entries:
> 
> --
>     echo    'Loading Linux 2.6.32-5-xen-amd64 ...'
>     multiboot    /boot/xen-4.0-amd64.gz placeholder
>     module    /boot/vmlinuz-2.6.32-5-xen-amd64 placeholder root=UUID=<UUID of 
> what seems to be the root device - (/dev/disk/by-uuid/<UUID> -> /dev/dm-0 
> (root))> ro  quiet
> --
> 
> Note that this contrasts with the non-Xen entries:
> 
> --
>     echo    'Loading Linux 2.6.32-5-xen-amd64 ...'
>     linux    /boot/vmlinuz-2.6.32-5-xen-amd64 root=/dev/mapper/<LVM2 volume 
> group>-<LVM2 logical volume for root> ro  quiet
> --

I've fixed this upstream.

2010-08-01  Colin Watson  <cjwatson at ubuntu.com>

        * util/grub.d/20_linux_xen.in: Don't use UUID for LVM root (matching
        util/grub.d/10_linux.in).  Fixes Debian bug #591093.

> Furthermore, the system has an ATI Radeon graphics card installed
> which seems to use Kernel Mode Setting (KMS) by default and this
> causes further issues when starting the X server in the system with
> Xen (in fact, firmware-linux-nonfree-0.26 had to be installed in order
> to get an X session regardless of Xen being started or not).

I don't plan to do anything about this in GRUB; it's a kernel problem,
and it should be handled there.  Of course, you can set
GRUB_CMDLINE_XEN=nomodeset in /etc/default/grub on your system if you
wish.

-- 
Colin Watson                                       [cjwatson at debian.org]