Nouveau - Feb 2011 - [Bug 34508] New: [grub x86_64-efi] Macbook 5, 2 - conflicting fb hw usage nouveaufb vs EFI VGA - removing generic driver

https://bugs.freedesktop.org/show_bug.cgi?id=34508

           Summary: [grub x86_64-efi] Macbook 5,2 - conflicting fb hw
                    usage nouveaufb vs EFI VGA - removing generic driver
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: dest at gatekeeper.fr
         QAContact: xorg-team at lists.x.org


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.

https://bugs.freedesktop.org/show_bug.cgi?id=34508

Gregory Bellier <dest at gatekeeper.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|blocker                     |critical
           Priority|medium                      |highest
                 CC|                            |dest at gatekeeper.fr

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https://bugs.freedesktop.org/show_bug.cgi?id=34508

--- Comment #1 from Gregory Bellier <dest at gatekeeper.fr> 2011-02-21
08:10:08 PST ---
Created an attachment (id=43609)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=43609)
Error when booting

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https://bugs.freedesktop.org/show_bug.cgi?id=34508

--- Comment #2 from Gregory Bellier <dest at gatekeeper.fr> 2011-03-09
08:56:45 PST ---
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
}

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--- Comment #3 from Pekka Paalanen <pq at iki.fi> 2011-03-11 11:58:00 PST
---
(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.

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--- Comment #4 from Gregory Bellier <dest at gatekeeper.fr> 2011-03-14
10:16:01 PDT ---
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 ?

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https://bugs.freedesktop.org/show_bug.cgi?id=34508

Gregory Bellier <dest at gatekeeper.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #5 from Gregory Bellier <dest at gatekeeper.fr> 2011-04-06
05:44:38 PDT ---
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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