Bug#759388: Os-prober doesn't notice initrd files other than debian's one

[Mauro Sacchetto <mauro.sacchetto@gmail.com>]

package: os-prober
version: 1.64

Os-prober doesn't notice initrd files other than debian's one.
In a partiion I've Slackware. I created a initd.gz for slaclware
(generic kernel needs a initrd for ext4 module, if not I receive
a kernel panic) and tried to make grub set it from debian.
Please, consider

1) in Slackware partition there is a initrd.gz
===========================================
root@debian:~# ls /mnt/slackware/boot/
config                  elilo-ia32.efi    inside.bmp     System.map                  
vmlinuz
config-generic-3.10.17  elilo-x86_64.efi  onlyblue.bmp   System.map-
generic-3.10.17  vmlinuz-generic-3.10.17
config-huge-3.10.17     initrd.gz         README.initrd  System.map-
huge-3.10.17     vmlinuz-huge-3.10.17
efi    
===========================================

2) os-prober doesn't notice it:
===========================================
root@debian:~# os-prober
/dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi
/dev/sdc4:Slackware Linux (Slackware 14.1):Slackware:linux
===========================================
and after, to control:
===========================================
root@debian:~# linux-boot-prober /dev/sdc4
/dev/sdc4:/dev/sdc4::/boot/vmlinuz-generic-3.10.17::root=/dev/sdc4
/dev/sdc4:/dev/sdc4::/boot/vmlinuz-huge-3.10.17::root=/dev/sdc4
===========================================

3) update-grub2 obviuosly doent's set that initrd:
===========================================
root@debian:~# update-grub2
Creazione di grub.cfg...
Trovata immagine linux: /boot/vmlinuz-3.14-2-amd64
Trovata immagine initrd: /boot/initrd.img-3.14-2-amd64
Trovato Windows Boot Manager su /dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi
Trovato Slackware Linux (Slackware 14.1) su /dev/sdc4
Adding boot menu entry for EFI firmware configuration
done
===========================================

4) the relevant part of /boor/grub/grub.cfg:
===========================================
menuentry 'Slackware Linux (Slackware 14.1)' --class gnu-linux --class gnu --
class os $menuentry_id_option 'osprober-gnulinux-simple-e76be8b8-55fb-47bd-
a5b7-2a30a50f4dbf' {
        insmod part_gpt
        insmod ext2
        set root='hd2,gpt4'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt4 --hint-
efi=hd2,gpt4 --hint-baremetal=ahci2,gpt4  e76be8b8-55fb-47bd-a5b7-2a30a50f4dbf
        else
          search --no-floppy --fs-uuid --set=root e76be8b8-55fb-47bd-
a5b7-2a30a50f4dbf
        fi
        linux /boot/vmlinuz-generic-3.10.17 root=/dev/sdc4
}
submenu 'Opzioni avanzate per Slackware Linux (Slackware 14.1)' 
$menuentry_id_option 'osprober-gnulinux-advanced-e76be8b8-55fb-47bd-
a5b7-2a30a50f4dbf' {
        menuentry 'Slackware Linux (Slackware 14.1) (su /dev/sdc4)' --class 
gnu-linux --class gnu --class os $menuentry_id_option 'osprober-
gnulinux-/boot/vmlinuz-generic-3.10.17--e76be8b8-55fb-47bd-a5b7-2a30a50f4dbf' 
{
                insmod part_gpt
                insmod ext2
                set root='hd2,gpt4'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt4 
--hint-efi=hd2,gpt4 --hint-baremetal=ahci2,gpt4  e76be8b8-55fb-47bd-
a5b7-2a30a50f4dbf
                else
                  search --no-floppy --fs-uuid --set=root e76be8b8-55fb-47bd-
a5b7-2a30a50f4dbf
                fi
                linux /boot/vmlinuz-generic-3.10.17 root=/dev/sdc4
        }
        menuentry 'Slackware Linux (Slackware 14.1) (su /dev/sdc4)' --class 
gnu-linux --class gnu --class os $menuentry_id_option 'osprober-
gnulinux-/boot/vmlinuz-huge-3.10.17--e76be8b8-55fb-47bd-a5b7-2a30a50f4dbf' {
                insmod part_gpt
                insmod ext2
                set root='hd2,gpt4'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt4 
--hint-efi=hd2,gpt4 --hint-baremetal=ahci2,gpt4  e76be8b8-55fb-47bd-
a5b7-2a30a50f4dbf
                else
                  search --no-floppy --fs-uuid --set=root e76be8b8-55fb-47bd-
a5b7-2a30a50f4dbf
                fi
                linux /boot/vmlinuz-huge-3.10.17 root=/dev/sdc4
        }
}
===========================================

i dont' understand why it's impossible to choose
between huge and generic kernel, and above all why
it lacks all occorrences of initrd