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Re: grub2 can't find kernel with dual boot


From: Foxy
Subject: Re: grub2 can't find kernel with dual boot
Date: Thu, 13 Aug 2009 21:42:34 +0100
User-agent: Thunderbird 2.0.0.22 (X11/20090608)

No, both vmlinuz and initrd are on /dev/sda7 in the boot partition...


Isaac Dupree wrote:
Michael Evans wrote:
I am purely guessing here, but grub2 may use the same notation as grub.

sda7 would be hd(0,6)
sda8 would be hd(0,7)

no, GRUB 2 uses linux-like numbering.

In this context, the 'root' would probably be the same as in grub, it
specifies the root device for -grub-'s data (usually /boot).

What it specifies is where the paths are interpreted from. It's the equivalent of saying

menuentry "Ubuntu karmic (development branch), kernel 2.6.31-2-generic (on /dev/sda6)" { linux (hd0,7)/boot/vmlinuz-2.6.31-2-generic root=UUID=6ad1f928-50b9-4aea-9495-95df46d08d58 ro quiet splash
     initrd (hd0,7)/boot/initrd.img-2.6.31-2-generic
 }

Are your vmlinuz and initrd in fact on that partition and with those exact names (not, say, with any of the version numbers increased, or, on /dev/sda6...)

-Isaac

On Wed, Aug 12, 2009 at 2:57 PM, Foxy <address@hidden> wrote:

 I have Ubuntu 9.04 Jaunty as my main OS, where I have upgraded GRUB to
GRUB2. I have also installed Ubuntu 9.10 Karmic on separate partitions. I am trying to boot Kramic, I have a message that I need to load kernel first. It looks like GRUB2 cannot find kernel. Probably the problem is that I have
/boot on a separate partition.

This is my config:

/boot/grub/grub.cfg (Karmic entry):

menuentry "Ubuntu karmic (development branch), kernel 2.6.31-2-generic (on
/dev/sda6)" {
    set root=(hd0,7)
    linux /boot/vmlinuz-2.6.31-2-generic
root=UUID=6ad1f928-50b9-4aea-9495-95df46d08d58 ro quiet splash
    initrd /boot/initrd.img-2.6.31-2-generic
}

/etc/fstab:

# / was on /dev/sda9 during installation
UUID=9018bfe2-9de3-4692-9883-fc2f875e6455 / ext3 relatime,errors=remount-ro 0 1

# /boot was on /dev/sda8 during installation
UUID=c3eb67b1-7f8f-419b-a462-c79a6c76e5de /boot ext2 relatime 0 2

# /home was on /dev/sda5 during installation
UUID=4802e809-ecaa-4932-bd01-4a816c0bbd4f /home ext3 relatime 0 2

# /media/test_boot was on /dev/sda7 during installation
UUID=0c98fbe4-ed7c-4134-994a-07d49074e137 /media/test_boot ext2 relatime 0 2

# /test was on /dev/sda6 during installation
UUID=6ad1f928-50b9-4aea-9495-95df46d08d58 /test ext3 relatime 0 2



blkid -c /dev/null:

/dev/sda2: UUID="4d5250be-75cf-4ce4-9295-ae5e2cabd441" TYPE="swap"
/dev/sda5: UUID="4802e809-ecaa-4932-bd01-4a816c0bbd4f" TYPE="ext3" - *my /home partition* /dev/sda6: UUID="6ad1f928-50b9-4aea-9495-95df46d08d58" TYPE="ext3" - *Karmic / partition* /dev/sda7: UUID="0c98fbe4-ed7c-4134-994a-07d49074e137" TYPE="ext2" - *Karmic /boot partition* /dev/sda8: UUID="c3eb67b1-7f8f-419b-a462-c79a6c76e5de" TYPE="ext2" - *Jaunty /boot partition* /dev/sda9: UUID="9018bfe2-9de3-4692-9883-fc2f875e6455" TYPE="ext3" - *Jaunty / partition*



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