I have a MacBook 5,2 equiped with a Nvidia 9400M. On this machine, I have the following bug https://bugs.launchpad.net/acpi/+bug/341230 which is also reported here : http://bugzilla.kernel.org/show_bug.cgi?id=13170 Basically, due to this bug, the OS doesn't boot unless the option maxcpus=1 is set in grub2. Some people say they managed to have both cores when they built grub2 for x86_64 for efi. This is what I've done with grub2 1.99rc1. I run Ubuntu 10.10 Desktop 64bits. I managed to boot the kernel but when the timestamp is at ~2 seconds, I hit a bug with this error: "fb: conflicting fb hw usage nouveaufb vs EFI VGA - removing generic driver". The screen freezes except the top which has a sort of green-ish square overlay. From there, the only thing I can do is to turn the computer off. I did some googling but I haven't come accross a similar problem. Maybe https://bugs.freedesktop.org/show_bug.cgi?id=29171 is a start. Please tell me how I could provide more informations. I don't experience this bug when I boot the kernel from grub in a "BIOS-way".
Created attachment 43609 [details] Error when booting
Ok, I confirm there is a problem with Nouveau. As soon as I installed the Nvidia binary, I've been able to boot with refit + grub-efi_x86_64. insmod efi_gop has to be added in the grub entry to be able to boot, like this : menuentry 'Linux without bios dump' { insmod efi_gop search --no-floppy --fs-uuid --set=root d5175c18-7da2-49a9-a3af-844bad27c91d linux /vmlinuz root=UUID=d5175c18-7da2-49a9-a3af-844bad27c91d ro initrd /initrd.img }
(In reply to comment #0) > I hit a > bug with this error: "fb: conflicting fb hw usage nouveaufb vs EFI VGA - > removing generic driver". FWIW, that message is not an error in itself, the system is simply doing the right thing: a generic driver (efifb) is being kicked out, so a hardware-specific driver (nouveau) can start driving the hardware.
Hmmm ok then. I would prefer to use the open source driver instead of nvidia's but in this case, I have no choice. What could I do to print a proper error ?
I did my tests with a 2.6.35 kernel. I built a custom kernel based on 2.6.38.2 and it works. Meaning, I can successfully boot on Linux when Nouveau and Grub-EFI are involved. This is a relief. Now I can drop NVidia binary ...
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