From Bugzilla Helper:
User-Agent: Mozilla/4.77 [en] (X11; U; Linux 2.4.2-2 i686)
Description of problem:
After performing an installation on a machine with an IDE hard drive
on /dev/hda and choosing automatic partitioning, the / partition
was not marked active and Grub would not boot the OS.
*** Bug 46772 has been marked as a duplicate of this bug. ***
If grub insists that it will only boot partitions marked "active", then this
will cause protblems as I have systems with many different partitions (different
systems or versions of systems) all of which I want to be able to boot.
GRUB doesn't care, only some (imho stupid) bioses care. Made it so we emulate
the old behavior of making sure at least one partition is active per drive.