I've been able to boot on Ubuntu 10.10 64 bits with Grub-EFI and Nouveau involved but it needs a 2.6.38.2 (at least, it's the one I have tested). I couldn't make it work with the 2.6.35.
I now have 2 cores.
If you want to stick with the 2.6.35, I've been able to have the 2 cores but with the Nvidia Binary. And with this latter, to change the brightness is a pain.
To sum up :
refit + grub-pc + nouveau => works if maxcpus=1 as a grub option.
refit + grub-efi + nouveau => doesn't work. Can't boot.
refit + grub-efi + nvidia binary => works and you have 2 cores, 3D and compiz effect but it's a real pain to change the brightness plus it's a blob.
refit + grub-efi + nouveau WITH a kernel at least 2.6.38 => works like a charm : 2 cores, 2D and you can change easily the brightness
I now have newer informations.
I've been able to boot on Ubuntu 10.10 64 bits with Grub-EFI and Nouveau involved but it needs a 2.6.38.2 (at least, it's the one I have tested). I couldn't make it work with the 2.6.35.
I now have 2 cores.
If you want to stick with the 2.6.35, I've been able to have the 2 cores but with the Nvidia Binary. And with this latter, to change the brightness is a pain.
To sum up :
refit + grub-pc + nouveau => works if maxcpus=1 as a grub option.
refit + grub-efi + nouveau => doesn't work. Can't boot.
refit + grub-efi + nvidia binary => works and you have 2 cores, 3D and compiz effect but it's a real pain to change the brightness plus it's a blob.
refit + grub-efi + nouveau WITH a kernel at least 2.6.38 => works like a charm : 2 cores, 2D and you can change easily the brightness
I hope this can help some of you.