[Bug 430659] Re: grub2 cannot find kernel in dual kubuntu/xubuntu 9.10 boot scenario
Aaron Luchko
aaron at luchko.ca
Thu Jan 3 20:54:13 UTC 2013
I can confirm this bug in 12.04.
I'm dual booting Ubuntu and Fedora both on logical volumes with a shared
home directory. The auto-detected Fedora system always results in the
error that it cannot find (or load?) the kernel. However, I am able to
boot with the following entries in /etc/grub.d/40_custom
# cat /etc/grub.d/40_custom
! /bin/sh
set -e
echo "
menuentry 'Fedora-Ubuntu, with Linux 3.6.10-2' --class fedora --class gnu-linux --class gnu --class os {
recordfail
insmod gzio
insmod lvm
insmod part_msdos
insmod ext2
set root='(vg_losgar-lv_fedora)'
search --no-floppy --fs-uuid --set=root e1726ee3-9b60-4d74-8995-fe714e94aec0
linux /vmlinuz-3.6.10-2.fc17.x86_64 root=/dev/mapper/vg_losgar-lv_fedora ro quiet splash vt.handoff=7
initrd /initramfs-3.6.10-2.fc17.x86_64.img
}
"
The issue with this workaround is it has to be manually updated and have
update-grub re-run in Ubuntu everytime I update the fedora kernel.
The file /boot/grub/default no longer seems to be present
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https://bugs.launchpad.net/bugs/430659
Title:
grub2 cannot find kernel in dual kubuntu/xubuntu 9.10 boot scenario
Status in “grub2” package in Ubuntu:
Confirmed
Bug description:
Binary package hint: grub2
I'm dual-booting Kubuntu and Xubuntu 9.10, but the auto-generated
grub.cfg file from Kubuntu does not correctly identify the Xubuntu
partition in a way that allows it to boot. I get an error message
when trying to load the Xubuntu installation stating, "Error - you
need to load the linux kernel first."
I had run the os-prober and update-grub2 from the Kubuntu
installation, and the update-grub2 command does seem to recognize the
Xubuntu installation. I've also checked the UUID of the Xubuntu
install's root partition and compared it to the detail included in the
grub.cfg file, and they match.
Here is some of the system detail:
jwc at nicodemus:/boot/grub$ sudo blkid
/dev/sda1: UUID="151902ed-9218-4bc9-9f53-ca7b55f14f04" TYPE="ext4" (Note: kubuntu root)
/dev/sda2: UUID="cf4eba13-d094-485c-a6b4-6e09eb7893e2" TYPE="ext3" (Note: kubuntu home)
/dev/sda5: UUID="795cab44-dc21-45d0-9681-eea67414de9c" SEC_TYPE="ext2" TYPE="ext3" (Note: xubuntu boot)
/dev/sda6: UUID="8cb0b4ef-ca5a-4eb3-b905-750096510dc1" TYPE="ext4" (Note: xubuntu root)
/dev/sda7: TYPE="swap" (swap!) :-)
/dev/sda8: UUID="1311ea8b-45f2-46c2-9fa3-c496e8e1014a" TYPE="ext4" (Note: xubuntu home)
-----------------------------------------------
$ jwc at nicodemus: cat grub.cfg
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
load_env
set default=0
if [ ${prev_saved_entry} ]; then
saved_entry=${prev_saved_entry}
save_env saved_entry
prev_saved_entry=
save_env prev_saved_entry
fi
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set 151902ed-9218-4bc9-9f53-ca7b55f14f04
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal gfxterm
fi
fi
set timeout=10
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/white
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
menuentry "Ubuntu, Linux 2.6.31-10-generic" {
set quiet=1
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set 151902ed-9218-4bc9-9f53-ca7b55f14f04
linux /boot/vmlinuz-2.6.31-10-generic root=UUID=151902ed-9218-4bc9-9f53-ca7b55f14f04 ro quiet splash
initrd /boot/initrd.img-2.6.31-10-generic
}
menuentry "Ubuntu, Linux 2.6.31-10-generic (recovery mode)" {
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set 151902ed-9218-4bc9-9f53-ca7b55f14f04
linux /boot/vmlinuz-2.6.31-10-generic root=UUID=151902ed-9218-4bc9-9f53-ca7b55f14f04 ro single
initrd /boot/initrd.img-2.6.31-10-generic
}
menuentry "Ubuntu, Linux 2.6.31-9-generic" {
set quiet=1
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set 151902ed-9218-4bc9-9f53-ca7b55f14f04
linux /boot/vmlinuz-2.6.31-9-generic root=UUID=151902ed-9218-4bc9-9f53-ca7b55f14f04 ro quiet splash
initrd /boot/initrd.img-2.6.31-9-generic
}
menuentry "Ubuntu, Linux 2.6.31-9-generic (recovery mode)" {
insmod ext2
set root=(hd0,1)
search --no-floppy --fs-uuid --set 151902ed-9218-4bc9-9f53-ca7b55f14f04
linux /boot/vmlinuz-2.6.31-9-generic root=UUID=151902ed-9218-4bc9-9f53-ca7b55f14f04 ro single
initrd /boot/initrd.img-2.6.31-9-generic
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Ubuntu karmic (development branch) (9.10) (on /dev/sda6)" {
insmod ext2
set root=(hd0,6)
search --no-floppy --fs-uuid --set 8cb0b4ef-ca5a-4eb3-b905-750096510dc1
linux /boot/vmlinuz-2.6.31-10-generic root=/dev/sda6
initrd /boot/initrd.img-2.6.31-10-generic
}
menuentry "Ubuntu karmic (development branch) (9.10) (on /dev/sda6)" {
insmod ext2
set root=(hd0,6)
search --no-floppy --fs-uuid --set 8cb0b4ef-ca5a-4eb3-b905-750096510dc1
linux /boot/vmlinuz-2.6.31-9-generic root=/dev/sda6
initrd /boot/initrd.img-2.6.31-9-generic
}
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file is an example on how to add custom entries
### END /etc/grub.d/40_custom ###
jwc at nicodemus:/boot/grub$ sudo parted -l
Model: ATA HITACHI HTS72321 (scsi)
Disk /dev/sda: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 10.5GB 10.5GB primary ext4 boot
2 10.5GB 21.0GB 10.5GB primary ext3
3 21.0GB 160GB 139GB extended
5 21.0GB 21.1GB 132MB logical ext3
6 21.1GB 33.6GB 12.5GB logical ext4
7 33.6GB 36.8GB 3197MB logical linux-swap(new)
8 36.8GB 160GB 123GB logical ext4
Please le tme know if you need additional info. Thanks!
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