dual boot, grub problem

shivam garg · 10-29-2011, 02:41 PM

i upgraded my system frm 11.04 to 11.10.
whenever i start my pc, the grub shows Ubuntu as the only OS on my pc, although i have windows as my 2nd OS.

pls help me in bringing windows as an option in grub.

thnx

yancek · 10-29-2011, 03:45 PM

Try opening a terminal and running this command: sudo os-prober
If that fails or you get a message that os-prober is not installed, install it with: sudo apt-get install os-prober
Run the command again and then run: sudo update-grub

This is assuming you are booting from Grub on your new Ubunt install??

RockDoctor · 10-29-2011, 03:47 PM

On my system, the entry in grub.cfg would look something like this:

Code:

menuentry "Windows (on /dev/sda1)" --class windows --class os {
        insmod part_msdos
        insmod ntfs
        set root='(hd0,msdos1)'
        search --no-floppy --fs-uuid --set=root 365829FF5829BF0D
        drivemap -s (hd0) ${root}
        chainloader +1
}

You can run the command

Code:

sudo blkid -c /dev/null

in a terminal window to get the proper uuid