grub-pc 30_os-prober script not working correctly.

[oshunluvr]

I have a slightly complicated setup and I'm doing my best to get along with grub-pc. I'm using Karmic 64-bit and grub-pc 1.97.

My issue is the 30_os-prober script is incorrectly creating menu entries that overlap each other.

The CLI output from update-grub:

root@office:/boot/grub# update-grub
Generating grub.cfg ...
Found Debian background: background.png
Found linux image: /boot/vmlinuz-2.6.31-20-generic
Found initrd image: /boot/initrd.img-2.6.31-20-generic
Found memtest86+ image: /memtest86+.bin
Found Ubuntu 9.10 (9.10) on /dev/sda5
done

The results in grub.cfg

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Ubuntu, Linux 2.6.31-19-generic (on /dev/sda5)" {
insmod ext2
set root=(hd0,5)
search --no-floppy --fs-uuid --set ebffb916-98b7-4f9c-85c5-4a91796710d1
linux /boot/vmlinuz-2.6.31-19-generic root=UUID=ebffb916-98b7-4f9c-85c5-4a91796710d1 ro quiet splash ipv6.disable=1
initrd /boot/initrd.img-2.6.31-19-generic
}
menuentry "Ubuntu, Linux 2.6.31-19-generic (recovery mode) (on /dev/sda5)" {
insmod ext2
set root=(hd0,5)
search --no-floppy --fs-uuid --set ebffb916-98b7-4f9c-85c5-4a91796710d1
linux /boot/vmlinuz-2.6.31-19-generic root=UUID=ebffb916-98b7-4f9c-85c5-4a91796710d1 ro single
initrd /boot/initrd.img-2.6.31-19-generic
}
menuentry "openSUSE 11.2 (on /dev/sda5)" {
insmod ext2
set root=(hd0,5)
search --no-floppy --fs-uuid --set ebffb916-98b7-4f9c-85c5-4a91796710d1
linux /vmlinuz root=UUID=418db53a-2d85-4148-a693-c721bca71af0 ro quiet splash
initrd /initrd
}
### END /etc/grub.d/30_os-prober ###

The first two entries are correct, the last one isn't.
I do have openSUSE 11.2 installed, but it's installed as /boot on /dev/sdb2 with / on /dev/md7 (a raid device). The correct entry for the openSUSE install I put in 40_custom like this

menuentry "openSUSE 11.2" {
insmod raid
insmod mdraid
insmod reiserfs
set root=(hd1,2)
search --no-floppy --fs-uuid --set 418db53a-2d85-4148-a693-c721bca71af0
linux /vmlinuz-2.6.31.12-0.1-desktop root=UUID=c04e1c76-8305-43f5-b6a8-db37947a0636 ro quiet splash ipv6.disable=1
initrd /initrd-2.6.31.12-0.1-desktop
}

It's odd that it doesn't report finding openSUSE, still puts it in (wrong), and I can't get it to detect it correctly.

[skunk]

Re: grub-pc 30_os-prober script not working correctly.

grub-pc 30_os-prober also does not handle Arch properly.

This is what ends up in grub.cfg

menuentry "Arch (on /dev/sda8)" {
    insmod ext2
    set root=(hd0,8)
    search --no-floppy --fs-uuid --set 1d88233e-5f1d-4fbd-8718-bdab2f7f6ca4
    linux /boot/vmlinuz26 root=/dev/sda8
}

I ended up having to put the correct entry into /etc/grub.d/40_custom

menuentry "ArchLinux (on /dev/sda8)" {
    insmod ext2
    set root=(hd0,8)
    search --no-floppy --fs-uuid --set 1d88233e-5f1d-4fbd-8718-bdab2f7f6ca4
    linux /boot/vmlinuz26 root=/dev/sda8 ro vga=834
    initrd /boot/kernel26.img
}
.
.
.

I believe that a bug has been opened against grub2 for the Arch snafu.

[oshunluvr]

Re: grub-pc 30_os-prober script not working correctly.

I thought it was rather odd that it apparently detects openSUSE, then puts it in wrong.

My setup is a bit more advanced than the usual I think.

4 sata hard drives and 1 ssd.

I have space for three RAID0 installs with separate /boot partitions, a dedicated GRUB partition, and four spaces for non-RAID standard installs, four large backup partitions, a RAID5 setup for my data files, 4 swap partitions and RAID0 /tmp, all on the 4 sata drive. The ssd is just for playing around at the moment.

The "overlapping" occurs with the openSUSE install being detected by GRUB as being on sda5 - which it's not, I have a backup kubuntu install there. openSUSE is on sdb2 for /boot and a RAID0 device for /.