I recently installed OS X (Hackintosh) on my PC on a partion, alongside Windows and Ubuntu. After some try with settings bootloader and other, my Ubuntu partition is no more active. Grub has been replaced with a non-working bootloader, so I restored Windows default bootloader.
So now, I have 3 OSes on my PC, but when PC turns on just windows starts. If I previously load an external bootloader I can boot OS X but there's no way to run Ubuntu.
Although this question seems to be related more on Chameleon the main question is: How can I set back the partition of Ubuntu to active (seen that it is the only OS I can no more boot) and how can I run it alongside OS X and Windows (possibly using Chameleon, but I wouldn't dislike using of other bootloaders)