[Bug 58556] MacBook Pro 5, 1 with nVidia 9400m and 9600m, scrambled screen

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=58556

Pierre Moreau <pierre.morrow-GANU6spQydw@public.gmane.org> changed:

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--- Comment #12 from Pierre Moreau <pierre.morrow-GANU6spQydw@public.gmane.org> ---
Hi Joanand,

(In reply to comment #6)
> Is there any config which would activate accel for 9400 but no accel for
> 9600? This would be very helpful for me.

You might also try, in nouveau_accel_init:

    if (device->chipset == 0x96)
        return;

It works without nouveau.noaccel=1 and has no scrambled screen (at least for
the GUI and the console, except for a tiny moment of full garbage (boot logo?)
but it gets cleared away after), but it is unstable (hanged up some times at
boot) and it spams a lot (more than 1600 lines) of

     nouveau E[PFB][0000:03:00:0] trapped write at 0x0000546000 on channel
0x0000fee0 [unknown] BAR/PFIFO_WRITE/FB reason: PAGE_NOT_PRESENT


Strangely, when connecting an external monitor to the laptop (MacBook Pro mid
2009, same cards), the GUI isn't scrambled any more and the console still is,
but in a "better way".


I'll try to find why with an external monitor or with acceleration on the 9400,
the handover goes well.

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