UbuntuHelp:MactelSupportTeam/EFI-Boot-Mactel

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https://help.ubuntu.com/community/MactelSupportTeam/EFI-Boot-Mactel

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Introduction

This page will attempt to document the status and procedure for booting Ubuntu Linux via EFI on Intel-Based Macintosh Computers (mactels). This is highly experimental and very different from the current recommended method of installation on a Mac. (See the [MactelSupportTeam/AppleIntelInstallation] Page). If you are interested in trying out something new, and is more native to how your Mac operates, please proceed. If you are looking to install a stable, reliable system, this is probably not for you.

Non-Working Hardware

Because there are several unknowns about Apple's implementation of EFI, there are some things that do not yet work correctly.

1. Your graphics are limited to using the framebuffer. This means no 3D Acceleration, no pretty desktop effects. (This is being worked on)
2. Item 2
3. Item 3

Basic Installation Procedure

The basic installation of Ubuntu is not really different from installing on any other Mac, but there is some software that you really need in addition in order to boot via EFI.

rEFIt

Both a CD install of rEFIt and a local install on the Mac OS partition will work. However, The CD install will shift the device identifier (ie. (hd1,1) instead of (hd0,1) and sdb1 instead of sda1) due to the way that the apple boot loader orders devices.

Installing Ubuntu

https://help.ubuntu.com/community/IconsPage?action=AttachFile&do=get&target=warning2.pngNOTE ON EXTERNAL HARD DRIVES:

Getting GRUB2 EFI

Some sections may just contain a list of links. It is sometimes useful to include a short explanation of what the links are for. For example: 'Ubuntu includes the following Internet applications by default.'

Binaries

You can download Binaries from the latest revision of GRUB2 here.

Compiling

Prerequisite Software

sudo apt-get install build-essential subversion gcc-multilibs bison ruby autoconf

Checkout the Subversion Source

svn co svn://svn.sv.gnu.org/grub/trunk/grub2

Compiling

./autogen.sh <
> ./configure --with-platform=efi <
> make <
> ./mk-grub-image <
> cp

Grub.cfg

The file format for the grub menu configuration has changed in GRUB2, and GRUB2 can be very picky about extra characters and small errors, and doesn't give very detailed errors about the problem.

Partition Notation

Note: if using a CD, refer to the rEFIt|section for proper partition notation. Legacy GRUB starting counting both disks and partitions starting with zero. GRUB2 counts disks from zero, but partitions start at one. First disk = (hd0) <
> First Partition on First Disk = (hd0,1) <
>

Example Config File

This is an example of a grub2 config file.

Installing grub.efi

Locations

On the OSX partition or on another hfsplus (Macos Extended) partition. Also on a FAT32 partition if using rEFIt.

Other OS Tweaks

Blacklist AGP

This may be needed for MacBook2,1 and some others using the intel video chip, if the 'fix_video' option is not used. Should not be needed for later model macs with radeon and nvidia graphics. Copy this text to a file named blacklist-agp. Code:

blacklist agpgart
blacklist amd-k7-agp
blacklist amd64-agp
blacklist sworks-agp
blacklist ati-agp
blacklist via-agp
blacklist sis-agp
blacklist efficeon-agp
blacklist intel-agp
blacklist ali-agp
blacklist nvidia-agp

then copy it to the /etc/modprobe.d/ directory

Set the xorg driver

Save a copy of existing xorg.conf for changing back to existing x configuration. Here is a single Section mini xorg.conf for intrepid xubuntu on a Mac``Book to use the fbdev driver. If you have an xorg.conf with Section "Device", just edit that Section in the Driver line, leave the Identifier line as is. /etc/X11/xorg.conf Code:

Section "Device"
	Identifier	"Configured Video Device"
	Driver 		"fbdev"
EndSection

Tested Hardware

1. Mac Version String (See how to find this here)
2. GRUB2 revision
3. Any Applied Patches
4. Synopsis of how it went / any problems?

MacBook4,1

1. Model: MacBook4,1
2. Grub2 revision: 2194 (64-bit)
3. Linux: Jaunty 64-bit (2.6.28 kernel), patched with attachment:e820.patch
4. Boot commands:

   fix_video
   linux /vmlinuz root=/dev/sdb2 video=efifb
   initrd /initrd.img
   

5. Notes:
   1. Boots ok, graphics are accelerated
   2. Console goes scrambled after X starts
   3. fixvideo must be part of the Grub2 core image, not a module

   See Also

   • [1] - Ubuntuforums discussion
   • [2] - Apple Users Forum on ubuntuforums.org.
   • MactelSupportTeam - The Mactel-Support Team.
   • <Link> - Explanation of link.

   External Links

   • [3] - GNU GRUB Wiki.
   • [4] - GNU GRUB Wiki/TestingOnEFI.
   • [5] - GNU GRUB Wiki/TestingOnMacbook.
   • [6] - GRUB2 Page.
   • [7] - Wikipedia article on EFI.
   • [8] - Intel EFI Page.
   • [9] - UEFI Homepage.
   • <Link> - Explanation of link.

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