[Bug 27501] MacBook Pro 5, x unable to boot [NV96 + NVAC]

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

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https://bugs.freedesktop.org/show_bug.cgi?id=27501

--- Comment #45 from thomas <gurutonic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to Pierre Moreau from comment #44)
> 
> Hi Thomas,
> 
> Good to hear you can use gnome-shell! :)
> 
> By
> > I haven't had any screen corruption with the 9400M.
> do you mean with the 9600M GT completely disabled?
> 

I use the efi stub loader with refind bootloader. Refind doesn't have an option
to use outb as in grub. I have set OSX preferences to "battery saving", so that
the firmware sets up the 9400 initially, but the 9600 is still technically
enabled. It shows up in lspci, etc. Whenever I test the 9600, I change the
setting in OSX back to "performance". So yes, with both cards enabled, the 9400
works without corruption.

> When using the 9600M GT without acceleration, do you have screen corruption
> in VT each time? If so, could you try to modify the patch a bit, like:
> - removing the write to 0x100c1c;
> - if removing the write doesn't work, changing the offset applied to
> priv->r100c08 maybe testing all 4-multiples should do it, from 0 to 28.

I've only tested the 9600 about 10 times, but I've always had corruption. I
will try your changes and see if it makes a difference.

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