I have a dual boot (actually triple with windows but that's irrelevant) with Ubuntu 12.04  and another Ubuntu . I recently upgraded  which may have overwritten 's grub with 's grub, ie  is top of the list and background color previously changed is back to purple.  being my main OS, Id like 's grub back :(
Im well aware of the windows-ubuntu MBR issue that can be fixed by reinstalling grub 2. Im just asking if there's a simpler way when it's about 2 ubuntus. What could I do knowing that I have access to all OS' ?
sudo update-grub in  isn't enough ...