Comment 25 for bug 96692

I am having the same issue on my macbook. 9.04 beta is using the ata_piix driver instead of the AHCI driver. As others mentioned earlier in this thread, the problem seems to be that the Apple bios emulator puts the controler into legacy mode (for which the ata_piix probably is the correct driver). ( http://forum.onmac.net/showthread.php?t=2739 has a reasonable summery of the problem and a solution). In a previous install of ubuntu, I had tried the fix using the modified stage1 grub and it worked perfectly fine. However, I would rather not install code into my MBR from a random untrusted webpage again and thus I would prefer, If ubuntu could provide a correctly patched stage1 for grub that reenables the AHCI mode on the MacBook. It is also necessary to make sure that you have the correct one (either RAID version or the AHCI version) and I wasn't sure which version the ones found on the various websites are.

Would it be possible for Ubuntu to provide this modified grub and perhaps add some comments about this issue on the documentation pages for running Ubuntu on a intel mac?