hybrid-graphics-linux team mailing list archive

[Metatech <metatechbe@xxxxxxxxx>]

Hi Andreas,

I have a question regarding the activation of the integrated card in BIOS mode.
How does it need to be configured ?
Is the BIOS file loaded by the BIOS emulation layer fully functional
(it is officiallly only meant to use the discrete card) ?

Thanks in advance,

metatech

==========================
To: Lekensteyn <lekensteyn@xxxxxxxxx>
From: Andreas Heider <andreas@xxxxxxxx>
Date: Thu, 08 Mar 2012 02:47:51 +0100
Cc: hybrid-graphics-linux@xxxxxxxxxxxxxxxxxxx
In-reply-to: <CALBR5Zxh5Z+y2vWWcTym56Hb1Vdjb3PpSbbRAaDWbkpL=xmT_w@xxxxxxxxxxxxxx>

>Luckily it's possible to also enable the integrated card in BIOS
>emulation mode. After staring a lot at the output of lspci -xxx from
>both EFI and BIOS boot I noticed that this just requires flipping one
>bit in the pci configuration space. This can be done by adding "setpci
>-d 8086:0044 54.b=0b" in grub. This value will most likely only work for
>this exact model, a MBP 6,2. For more information see
>http://download.intel.com/design/processor/datashts/322813.pdf page 62.