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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - nVidia 9600M GT (Macbook Pro current model) is unable to boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=27501#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - nVidia 9600M GT (Macbook Pro current model) is unable to boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=27501">bug 27501</a>
from <span class="vcard"><a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> <span class="fn">Ilia Mirkin</span></a>
</span></b>
<pre>You guys are probably all aware of this, but it seems like one solution is to
have the bootloader kill the NV96 card on boot, if you're using grub2:
<a href="https://help.ubuntu.com/community/UEFIBooting#Selecting_the_graphic_card">https://help.ubuntu.com/community/UEFIBooting#Selecting_the_graphic_card</a>
<a href="http://askubuntu.com/questions/149921/how-to-add-a-command-permanently-to-grub2">http://askubuntu.com/questions/149921/how-to-add-a-command-permanently-to-grub2</a>
One could also make an early quirk that does this as well based on a DMI match.
I wrote up a quick patch to do that, but it's completely untested (see below).
I doubt it'd be upstream-appropriate though, as it would kill the possibility
of using the second card entirely.
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 230c8ea..8cb7665 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1357,6 +1357,12 @@ static int __init dmi_ignore_irq0_timer_override(const
struct dmi_system_id *d)
return 0;
}
+static int __init disable_macbook_second_video(const struct dmi_system_id *d)
+{
+ outb(0, 0x750);
+ return 0;
+}
+
/*
* If your system is blacklisted here, but you find that acpi=force
* works for you, please contact <a href="mailto:linux-acpi@vger.kernel.org">linux-acpi@vger.kernel.org</a>
@@ -1432,6 +1438,15 @@ static struct dmi_system_id __initdata acpi_dmi_table[]
= {
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
},
},
+ {
+ .callback = disable_macbook_second_video,
+ .ident = "Apple MacBook5",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"),
+ },
+ },
+
{}
};</pre>
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