Ok, so I installed Fedora on a dual boot Windows 7 and Ubuntu machine to see which distro I liked better, and now Ubuntu doesn't appear in the GRUB menu. In fact, Windows doesn't either. There are only two items, Fedora and Other (which boots Windows) How do I get GRUB to recognize all installed operating systems?
If you want to keep the Linux distributions as separate as possible, I would suggest only installing one distro's boot loader to the MBR (e.g.
If you use Ubuntu's
After saving the file, run
This should give each Linux distro its own boot loader configuration to play with and reduce the chance of them stepping on each others feet. It will even handle the case of different distros expecting different boot loaders.