Please run this command to improve out-of-the-box Linux support for all Mac models

[lael]

<"Apple Inc.">
<"MacBookPro5,2">
FrameBuff erBase: 0xc0010000
PixelsPerScanLine: 2048
HorizontalResolution: 1920
VerticalResolution: 1200

Identical for both the 9400M and the 9600M GT cards.

[lael]

<"Apple Inc.">
<"MacBookPro6,1">
FrameBuff erBase: 0x90030000
PixelsPerScanLine: 2048
HorizontalResolution: 1920
VerticalResolution: 1200

I get the same result when using the Intel HD Graphics or the Nvidia GeForce GT 330M card (can see which one in the system profiler)

[lael]

hey man id love to help, but im when i run the command i get the same output for both of my graphics cards.. or at least what i think is both cards...

<"Apple Inc.">
<"MacBookPro6,2">
FrameBuff erBase: 0x90030000
PixelsPerScanLine: 2048
HorizontalResolution: 1680
VerticalResolution: 1050

im prolly doing it wrong ya?

I saw the same exact result with my MacBookPro6,1, I tried a bunch of stuff, and even ran some HD 1080p content that would scale up the larger graphics card.

I don't know much about this, but from what I read about how the seamless graphics switching, it makes sense that they both use the same memory location isn't that how they seamlessly switch between cards, by utilizing the same buffer space?

http://www.anandtech.com/show/2934/n...-asus-ul50vf/3

[metatechbe]

lael,

Thanks for your (double) contribution !
For the MacBookPro 5,2, are you sure you did a full reboot after switching the graphic card ? On my 5,3, it is really needed (gfxCardStatus or logout/login is not enough)...

Thanks,

metatech

[metatechbe]

Hello,

From the kernel source it seems that it is not needed to recompile the kernel, adding this kernel parameter should be enough (the values are specific to your model, coming from the ioreg/dtrace output) :

video=efifb:base:0xc0030000,stride:2048,width:1440,height:900

I still need to test it. I plan to add it /etc/default/grub in the GRUB_CMDLINE_LINUX_DEFAULT option.

Regards,

metatech

[lael]

lael,

Thanks for your (double) contribution !
For the MacBookPro 5,2, are you sure you did a full reboot after switching the graphic card ? On my 5,3, it is really needed (gfxCardStatus or logout/login is not enough)...

Thanks,

metatech

You are right. Rebooting did make a difference.
9400M:
<"Apple Inc.">
<"MacBookPro5,2">
FrameBuff erBase: 0xc0010000
PixelsPerScanLine: 2048
HorizontalResolution: 1920
VerticalResolution: 1200

9600M GT:
<"Apple Inc.">
<"MacBookPro5,2">
FrameBuff erBase: 0xb0030000
PixelsPerScanLine: 2048
HorizontalResolution: 1920
VerticalResolution: 1200

[lael]

Hello,

From the kernel source it seems that it is not needed to recompile the kernel, adding this kernel parameter should be enough (the values are specific to your model, coming from the ioreg/dtrace output) :

video=efifb:base:0xd001000,stride:2048,width:1440,height:900

I still need to test it. I plan to add it /etc/default/grub in the GRUB_CMDLINE_LINUX_DEFAULT option.

Regards,

metatech

Does this mean that it will be possible to boot directly into GRUB2 skipping rEFIt?

I like that rEFIt exists, but I don't like seeing 2 boot screens on every boot.

[doctorjames]

<"Apple Inc.">
<"Macmini3,1">
FrameBufferBase: 0xc0010000
PixelsPerScanLine: 2048
HorizontalResolution: 1280
VerticalResolution: 800

<"Apple Inc.">
<"MacBookPro4,1">
FrameBuff erBase: 0xc0060000
PixelsPerScanLine: 2048
HorizontalResolution: 1440
VerticalResolution: 900

[Hiram]

<"Apple Inc.">
<"MacBook5,1">
FrameBuff erBase: 0x80010000
PixelsPerScanLine: 2048
HorizontalResolution: 1280
VerticalResolution: 800

[Nikos.Alexandris]

Does this mean that it will be possible to boot directly into GRUB2 skipping rEFIt?

I like that rEFIt exists, but I don't like seeing 2 boot screens on every boot.

If this works there will be a 20+ seconds cut-off from waiting rEFIt, etc. Then again, e.g. when in need to check for firmware updates (=boot in OSX), booting OSX won't be possible, right?