On 30/01/2013 11:54, Maurice Batey wrote:
On Sun, 20 Jan 2013 14:39:26 +0000, James Kerr wrote:

Grub2 created a boot menu that enables me to
successfully boot the pre-existing Mageia2 installation.

    James, does the Mageia2 installation have GRUB-Legacy in the PBR?

No. Mageia 2's Grub boot-loader was installed to the MBR of the boot disk.


    What is the GRUB2 boot stanza that boots Mageia2?

This is the stanza in /boot/grub2/grub.cfg for Mageia 2:


menuentry 'linux (on /dev/sdb1)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz--20599988-d027-4cd2-80c4-b834e1013a80' {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1 20599988-d027-4cd2-80c4-b834e1013a80
                else
search --no-floppy --fs-uuid --set=root 20599988-d027-4cd2-80c4-b834e1013a80
                fi
linux /boot/vmlinuz BOOT_IMAGE=linux root=LABEL=mga-root splash quiet nokmsboot resume=UUID=a3dabcb9-c43e-4035-8bbe-576aa9c5573b vga=788
                initrd /boot/initrd.img


I've attached grub.cfg, in case it's of some help.

os-prober creates a boot menu which lists the first entry from Grub's menu.lst on the top-level Grub2 boot menu, even when the first entry in menu.lst is not the default. As a result, in order to reach the menu entry for Mageia 2, I have to access the second level "Advanced options" menu.

On this system /dev/sdb is the boot disk.

Jim



#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if loadfont unicode ; then
  set gfxmode=1024x768x32
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=en_GB
  insmod gettext
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='hd1,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos8 
--hint-efi=hd1,msdos8 --hint-baremetal=ahci1,msdos8  
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
else
  search --no-floppy --fs-uuid --set=root f64c1cea-d7d7-44f6-8c3f-90d4dc886511
fi
insmod gfxmenu
insmod png
set theme=($root)/boot/grub2/themes/maggy/theme.txt
export theme
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Mageia GNU/Linux' --class mageia --class gnu-linux --class gnu 
--class os $menuentry_id_option 
'gnulinux-simple-f64c1cea-d7d7-44f6-8c3f-90d4dc886511' {
        set gfxpayload=text
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='hd1,msdos8'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos8 
--hint-efi=hd1,msdos8 --hint-baremetal=ahci1,msdos8  
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
        else
          search --no-floppy --fs-uuid --set=root 
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
        fi
        echo    'Loading Linux desktop ...'
        linux   /boot/vmlinuz-desktop 
root=UUID=f64c1cea-d7d7-44f6-8c3f-90d4dc886511 ro  splash
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd-desktop.img
}
submenu 'Advanced options for Mageia GNU/Linux' $menuentry_id_option 
'gnulinux-advanced-f64c1cea-d7d7-44f6-8c3f-90d4dc886511' {
        menuentry 'Mageia GNU/Linux, with Linux desktop' --class mageia --class 
gnu-linux --class gnu --class os $menuentry_id_option 
'gnulinux-desktop-advanced-f64c1cea-d7d7-44f6-8c3f-90d4dc886511' {
                set gfxpayload=text
                insmod gzio
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos8'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos8 --hint-efi=hd1,msdos8 --hint-baremetal=ahci1,msdos8  
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
                else
                  search --no-floppy --fs-uuid --set=root 
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
                fi
                echo    'Loading Linux desktop ...'
                linux   /boot/vmlinuz-desktop 
root=UUID=f64c1cea-d7d7-44f6-8c3f-90d4dc886511 ro  splash
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd-desktop.img
        }
        menuentry 'Mageia GNU/Linux, with Linux 3.8.0-desktop-0.rc5.1.mga3' 
--class mageia --class gnu-linux --class gnu --class os $menuentry_id_option 
'gnulinux-3.8.0-desktop-0.rc5.1.mga3-advanced-f64c1cea-d7d7-44f6-8c3f-90d4dc886511'
 {
                set gfxpayload=text
                insmod gzio
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos8'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos8 --hint-efi=hd1,msdos8 --hint-baremetal=ahci1,msdos8  
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
                else
                  search --no-floppy --fs-uuid --set=root 
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
                fi
                echo    'Loading Linux 3.8.0-desktop-0.rc5.1.mga3 ...'
                linux   /boot/vmlinuz-3.8.0-desktop-0.rc5.1.mga3 
root=UUID=f64c1cea-d7d7-44f6-8c3f-90d4dc886511 ro  splash
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd-3.8.0-desktop-0.rc5.1.mga3.img
        }
        menuentry 'Mageia GNU/Linux, with Linux 3.8.0-desktop-0.rc4.1.mga3' 
--class mageia --class gnu-linux --class gnu --class os $menuentry_id_option 
'gnulinux-3.8.0-desktop-0.rc4.1.mga3-advanced-f64c1cea-d7d7-44f6-8c3f-90d4dc886511'
 {
                set gfxpayload=text
                insmod gzio
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos8'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos8 --hint-efi=hd1,msdos8 --hint-baremetal=ahci1,msdos8  
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
                else
                  search --no-floppy --fs-uuid --set=root 
f64c1cea-d7d7-44f6-8c3f-90d4dc886511
                fi
                echo    'Loading Linux 3.8.0-desktop-0.rc4.1.mga3 ...'
                linux   /boot/vmlinuz-3.8.0-desktop-0.rc4.1.mga3 
root=UUID=f64c1cea-d7d7-44f6-8c3f-90d4dc886511 ro  splash
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd-3.8.0-desktop-0.rc4.1.mga3.img
        }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 7 (loader) (on /dev/sda1)' --class windows --class os 
$menuentry_id_option 'osprober-chain-9A008B35008B1801' {
        insmod part_msdos
        insmod ntfs
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 
--hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  9A008B35008B1801
        else
          search --no-floppy --fs-uuid --set=root 9A008B35008B1801
        fi
        chainloader +1
}
menuentry 'Mageia 2 (2)' --class gnu-linux --class gnu --class os 
$menuentry_id_option 
'osprober-gnulinux-simple-20599988-d027-4cd2-80c4-b834e1013a80' {
        insmod part_msdos
        insmod ext2
        set root='hd1,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos1 
--hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
        else
          search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
        fi
        linux /boot/vmlinuz-all BOOT_IMAGE=install_beta_1 root=/dev/ram3 
ramdisk_size=32000 vga=791
        initrd /boot/all.rdz
}
submenu 'Advanced options for Mageia 2 (2)' $menuentry_id_option 
'osprober-gnulinux-advanced-20599988-d027-4cd2-80c4-b834e1013a80' {
        menuentry 'install cauldron (on /dev/sdb1)' --class gnu-linux --class 
gnu --class os $menuentry_id_option 
'osprober-gnulinux-/boot/vmlinuz-all--20599988-d027-4cd2-80c4-b834e1013a80' {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
                else
                  search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
                fi
                linux /boot/vmlinuz-all BOOT_IMAGE=install_beta_1 
root=/dev/ram3 ramdisk_size=32000 vga=791
                initrd /boot/all.rdz
        }
        menuentry 'linux (on /dev/sdb1)' --class gnu-linux --class gnu --class 
os $menuentry_id_option 
'osprober-gnulinux-/boot/vmlinuz--20599988-d027-4cd2-80c4-b834e1013a80' {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
                else
                  search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
                fi
                linux /boot/vmlinuz BOOT_IMAGE=linux root=LABEL=mga-root splash 
quiet nokmsboot resume=UUID=a3dabcb9-c43e-4035-8bbe-576aa9c5573b vga=788
                initrd /boot/initrd.img
        }
        menuentry 'linux-nonfb (on /dev/sdb1)' --class gnu-linux --class gnu 
--class os $menuentry_id_option 
'osprober-gnulinux-/boot/vmlinuz--20599988-d027-4cd2-80c4-b834e1013a80' {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
                else
                  search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
                fi
                linux /boot/vmlinuz BOOT_IMAGE=linux-nonfb root=LABEL=mga-root 
nokmsboot resume=UUID=a3dabcb9-c43e-4035-8bbe-576aa9c5573b
                initrd /boot/initrd.img
        }
        menuentry 'failsafe (on /dev/sdb1)' --class gnu-linux --class gnu 
--class os $menuentry_id_option 
'osprober-gnulinux-/boot/vmlinuz--20599988-d027-4cd2-80c4-b834e1013a80' {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
                else
                  search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
                fi
                linux /boot/vmlinuz BOOT_IMAGE=failsafe root=LABEL=mga-root 
failsafe
                initrd /boot/initrd.img
        }
        menuentry 'desktop 3.3.6-2.mga2 (on /dev/sdb1)' --class gnu-linux 
--class gnu --class os $menuentry_id_option 
'osprober-gnulinux-/boot/vmlinuz-3.3.6-desktop-2.mga2--20599988-d027-4cd2-80c4-b834e1013a80'
 {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
                else
                  search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
                fi
                linux /boot/vmlinuz-3.3.6-desktop-2.mga2 
BOOT_IMAGE=desktop_3.3.6-2.mga2 root=LABEL=mga-root splash quiet nokmsboot 
resume=UUID=a3dabcb9-c43e-4035-8bbe-576aa9c5573b vga=788
                initrd /boot/initrd-3.3.6-desktop-2.mga2.img
        }
        menuentry 'desktop 3.3.8-2.mga2 (on /dev/sdb1)' --class gnu-linux 
--class gnu --class os $menuentry_id_option 
'osprober-gnulinux-/boot/vmlinuz-3.3.8-desktop-2.mga2--20599988-d027-4cd2-80c4-b834e1013a80'
 {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
                else
                  search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
                fi
                linux /boot/vmlinuz-3.3.8-desktop-2.mga2 
BOOT_IMAGE=desktop_3.3.8-2.mga2 root=LABEL=mga-root splash quiet nokmsboot 
resume=UUID=a3dabcb9-c43e-4035-8bbe-576aa9c5573b vga=788
                initrd /boot/initrd-3.3.8-desktop-2.mga2.img
        }
        menuentry 'desktop 3.4.24-3.mga2 (on /dev/sdb1)' --class gnu-linux 
--class gnu --class os $menuentry_id_option 
'osprober-gnulinux-/boot/vmlinuz-3.4.24-desktop-3.mga2--20599988-d027-4cd2-80c4-b834e1013a80'
 {
                insmod part_msdos
                insmod ext2
                set root='hd1,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root 
--hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  
20599988-d027-4cd2-80c4-b834e1013a80
                else
                  search --no-floppy --fs-uuid --set=root 
20599988-d027-4cd2-80c4-b834e1013a80
                fi
                linux /boot/vmlinuz-3.4.24-desktop-3.mga2 
BOOT_IMAGE=desktop_3.4.24-3.mga2 root=LABEL=mga-root splash quiet nokmsboot 
resume=UUID=a3dabcb9-c43e-4035-8bbe-576aa9c5573b vga=788
                initrd /boot/initrd-3.4.24-desktop-3.mga2.img
        }
}

### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

### BEGIN /etc/grub.d/90_persistent ###
### END /etc/grub.d/90_persistent ###

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