Sorry, I have to step back. In my particular case, the problem was that I also have launched sudo update-grub on my Quantal installation. And this created a /boot/grub/grub.cfg file on my Quantal partition.
For some reasons, existing grub.cfg files on other partitions seem to completely fool the update-grub scripts on other partitions (more precise, the linux-boot-order script). In my case, the problem was solved by removing the grub.cfg file on the Quantal partition (I still launch update-grub on my Precise partition). I find abnormally that the mere existence of grub.cfg files on other partitions completely fool the update-grub scripts (actually, the linux- boot-prober scripts) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1017678 Title: Duplicate entries in grub2 menu for second ubuntu installed on another partition To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1017678/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
