Public bug reported:
Binary package hint: ubiquity
Ubuntu 8.04 Final
Intel Macs have an EFI system and a GPT. The installer seems to handle
the GPT correctly (as it has in the past), but it has recently come up
that the installer is completely emptying the contents of the MBR
partition table which is still required to boot Windows and Ubuntu (GRUB
relies on the MBR partition table). The two tables are not synced
automatically.
When users install Hardy, they are suprised to find that the system is
unbootable (the EFI loader cannot "see" the partition as bootable). a
tool such as rEFIt or gptsync can copy the information in the GPT into
the MBR table thus fixing the issue (for most).
This is even more serious for users with other working OS installs in
addition to Ubuntu (such as other linux distros and Windows) since it
completely dumps the information needed to boot these installs as well.
The expected procedure (and how the previous Ubuntu install seems to
have handled it) is to 'update' both the GPT and the MBR table with
changes instead of completely losing the information stored there.
gparted / parted seemed to update both tables properly previously as
well.
I will be doing a full install on my iMac later and will be able to add
additional information.
** Affects: mactel-support
Importance: High
Status: Confirmed
** Affects: ubiquity (Ubuntu)
Importance: Undecided
Status: New
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MBR Partition Table is cleared during install
https://bugs.launchpad.net/bugs/222126
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