Grub (Ubuntu) does not detect Fedora 17

[fantab]

This never happened before. I always dual boot Ubuntu and Fedora and use Grub from Ubuntu. I have just installed Ubuntu 12.04 amd_64.
Grub menu does not detect nor list Fedora installation. Fedora 17 grub is installed to its own / partition. Earlier, I had installed Fedora 17 and its Grub to the HD and then went on to install Ubuntu 12.04 and let the installation replace Fedora Grub... like I have been doing in the past.

Yet, Ubuntu Grub does not detect Fedora at all.

Any help is welcome.

[glennzo]

Mount the Fedora partition when running Ubuntu and then try updating grub.

[Dan]

Ayup. And if you run a separate /boot partition, mount that too.

[fantab]

Thanks all.

I figured that out. I had to mount Fedora partition before updating grub. With previous Ubuntu versions this was not required.