grub2 confuses Windows Vista/7 with Windows Recovery Environment

[Jonathan Winterflood]

Hi all,

Having recently installed Ubuntu 10.10 on a machine alongside Vista, I noticed that grub (1.98+20100804-5ubuntu3) incorrectly detects the nature of my "Windows Recovery Environment" and "Windows Vista" partitions:


### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows Vista (loader) (on /dev/sda1)" {
    insmod part_msdos
    insmod ntfs
    set root='(hd0,msdos1)'
    search --no-floppy --fs-uuid --set 64bce3a1bce36bcc


    chainloader +1
}
menuentry "Windows Recovery Environment (loader) (on /dev/sda2)" {
    insmod part_msdos
    insmod ntfs
    set root='(hd0,msdos2)'
    search --no-floppy --fs-uuid --set bc3c53c13c5374fc


    drivemap -s (hd0) ${root}
    chainloader +1
}
### END /etc/grub.d/30_os-prober ###

The correct order is the opposite (Vista on sda2)
Booting the 'wrong' one seems to boot the correct one fine, despite "drivemap -s (hd0) ${root}" being missing/added.



This means that the computer's main user (not an experienced user) could get very confused and trash the whole system....
I could recreate the entries as custom (as mentioned in a previous message on help-grub, see below), but then there would be two sets of Windows entries, which may be even more confusing....


This seems to be a bug in os-prober to me, but a quick look at 30_os-prober has left me unable to diagnose where the problem is.

It has been previously mentioned here (with apparently no recognition or de-qualification as a bug):


1) http://lists.gnu.org/archive/html/bug-grub/2010-11/msg00010.html
2) http://lists.gnu.org/archive/html/help-grub/2010-08/msg00022.html


3) http://lists.gnu.org/archive/html/help-grub/2010-09/msg00020.html
re: http://lists.gnu.org/archive/html/help-grub/2010-09/msg00021.html


I cannot see any mention of this on http://savannah.gnu.org/bugs/?group=grub either

I would have a look at patching this myself, but by the time I've been pointed in the right direction, the person pointing might be able to just fix it...



Best Regards,
--
Jonathan