Mac Pro 2007 and the Bootloader issues with EFI

So, I've been working to get Arch on an old mac pro that I'm currently using for work. This is the oldest of the old Mac Pros ever made, and uses 32-bit EFI and has 32GB of ram. This means that I need to use a 64-bit OS, but am having immense difficulty getting it to boot.
I am installing to /dev/sdb, and /dev/sda contains the EFI partition and Mac OSX.
I'm currently using rEFInd liveCD to find and boot the .efi files. I can select and boot into grub2 (which is stored completely on the EFI partition on /dev/sda), and have been able configure it so that it can find the vmlinuz-linux and initrd successfully (both stored on /dev/sdb2), but whenever I try to boot it, I get the following message:
"No suitable video mode found.
Booting in blind mode"
At which time no keyboard input is accepted, and I have to reboot and try again. I know that the system uses UGA, and I tried adding that to grub.conf, but no results. Even with grub-mkconfig, I cannot get it to boot without receiving that error message.
How can I get my system to boot correctly? I've been working on this for about a week, so all help is appreciated.
Here was my process.
Steps:
1. Tried to install from new arch linux media. The media would not boot, no matter what I tried. Changed to 64-bit Archbang live-cd. Booted fine.
2. Created a GPT disk with a protective MBR on /dev/sdb (/dev/sda contains the EFI fat32 partition and the macintosh OS).
3. Installed Archbang onto GPT disk on /dev/sdb3, as /root /dev/sdb4 as /home, /dev/sdb2 as /boot and /dev/sda1 as /boot/efi
4. Chrooted from the LiveCD into the disk, updated pacman, installed grub-efi-i386, built the sysimage and kernel (stored in /boot on /dev/sdb2), and grub mkconfig storing all of it to the EFI partition at /boot/efi/EFI/grub
Gdisk prints the following for /dev/sdb
Disk /dev/sdb: 976773168 sectors, 465.8 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 43A3E85A-F473-468C-B361-6B3383AA65C5
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 976773134
Partitions will be aligned on 2048-sector boundaries
Total free space is 4077 sectors (2.0 MiB)
Number Start (sector) End (sector) Size Code Name
1 4096 413695 200.0 MiB AF00 Apple HFS/HFS+
2 413696 618495 100.0 MiB 8300 Linux filesystem /boot
3 618496 164458495 78.1 GiB 8300 Linux filesystem /
4 164458496 976773119 387.3 GiB 8300 Linux filesystem /home

bsilbaugh wrote:In regards to the step 1 you described in your post, you mentioned difficulty booting "arch linux media". What did you mean by "arch linux media"? Is this a CD you burned containing the latest Arch Linux ISO? If so, did you verify the checksum of the iso image you downloaded, and that it burned correctly to CD?
Yes. I verified that the 2012.09.07 official Arch Linux installation iso burned correctly and that the checksum was correct. What happened was that the disc would attempt to load after selecting it in the Mac bootloader, and then I would get a black screen with the following
" 1.
2.
Please select an option:
At this point the keyboard was unresponsive, and not recognized by the USB bus (I use a backlit keyboard, and it was not lit). So I changed strategies.
WonderWoofy wrote:You say that you need to use a 64-bit OS, don't you mean 32-bit.
No, I mean that I have to be able to use 32 Gigabytes of RAM with any application I am using, which cannot be done with a 32-bit OS. This system is used for Memory intensive 3D images and volumes.
WonderWoofy wrote:A 32-bit EFI is incapable of booting a 64-bit OS. I should know, I have a late 2006 MacBook and spent quite a bit of time banging my head against the wall over this. If you want to use a 64-bit OS, you have to use bios emulation. This is in fact why those other distros you mention above boot correctly. Many Mac users tend to (incorrectly) call this mode bootcamp.
Can you provide a link with a procedure or more information about booting in BIOS mode? I think all the places I looked I ignored this because I wasn't sure what the difference was.
WonderWoofy wrote:I think with the new install discs and macs, you have to remove the UEFI. Especially in your case where you need a 32-bit uefi, as this is not an option on the installer. I tried booting an installer on my macbook, and it would not go. These forums were filled with these threads a couple months ago, and the.redikulus.rat pointed everyone to a page in our wiki to remove the UEFI. Personally I did not try I because my mac is not my main machine anymore, but it is reported to work.
You know you can install Arch from any live cd or other distro now that it is a chroot install method. You could before, if you didn't use the AIF, but now there is no choice. I think it would be especially easy with the archbang live cd, as I think that they use the same repositories. So you should be able to install the arch-install-scripts package. If not, you could always simply fire up links and download the package and manually install it. Then you should be able to proceed like normal.
I am unclear what you mean with removing the UEFI. Do you mean removing it from the kernel or the bootloader? Please, point me to this page used by the.redikulus.rat. As for the second half, I have already installed via chroot, and the difficulty is getting it to boot from anywhere.

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