Comment 43 for bug 341230

I also have a MacBook 5,2 (early 2009) and I experience the same errors than you do. This has been tested on Ubuntu 10.10

I managed to build a grub2 1.99rc1 x86_64-efi.
I had to do some tweaks to make some progress. I'm hacking directly in grub.cfg but from now, I don't care, I just want to test. So here is my entry :
menuentry 'Ubuntu, with Linux 2.6.35-25-generic' --class ubuntu --class gnu-linux --class gnu --class os {
        insmod part_gpt
        insmod ext2
        set debug=video
        insmod efi_gop
        set root='(hd0,gpt3)'
        search --no-floppy --fs-uuid --set=root d5175c18-7da2-49a9-a3af-844bad27c91d
        linux /boot/vmlinuz-2.6.35-25-generic root=UUID=d5175c18-7da2-49a9-a3af-844bad27c91d ro
        initrd /boot/initrd.img-2.6.35-25-generic
}

The options are pretty much the same than the ones from my working grub (with maxcpus=1).

At my first boot, I got "error: no argument specified". From what I've seen on the internet, it's because the syntax is different between Grub 1.98 and 1.99rc1. In 1.98 it's --set d5175c18... while --set=root is needed for 1.99rc1. However, this error wasn't a real problem because we're asked to press a key and then the boot continues.

It continues until the second error: "error: no suitable mode found". I've resolved this error by putting "set debug=video" and "insmod efi_gop" in my grub entry.

From this point, I can see that the kernel starts booting until the error I now have which I haven't solved yet : "fb: conflicting fb hw usage nouveaufb vs EFI VGA - removing generic driver".

I hope this post will help some of you to make some progress until the point I've reached.

I also tried what post #41 detailed but I have the very same error : conflicting fb...