[Intel-gfx] Help to enable Iris Pro on Retina MBP 11.3

[Jani Nikula]

On Tue, 07 Jan 2014, "Lu, Ran" <hephooey at gmail.com> wrote:
> Hi Jani,
>
> As a matter of fact, I tried kernel from 3.9 to 3.13-rc6, all of them cannot 
> read the pci information from 0:2.0, and lspci do not have Iris Pro as a video 
> controller. I put in the attachment dmesg output from 3.12.6, I added some 
> printk to show the results from pci_bus_read_dev_vendor_id, otherwise it is a 
> vanilla kernel. I do not think I get any extra information by adding 
> drm.debug=0xe because the pci device is never registered properly, but it was 
> there anyway.The weird thing is grub can read pci device fine, I took a picture 
> since I do not know how to save outputs in grub console. I did some test with 
> another laptop with a working HD 4600. It seems even if I use setpci -s 0:2.0 
> 4.b=0 to disable the device, it is still responsive to further setpci and I 
> can bring it back by setting 4.b=7. Now it does not look like the video card 
> is disable. I guess maybe something wrong in the ACPI table triggered the 
> kernel to read the wrong place. But still strange it only missed that 
> particular bus. In case you are interested, I also put the dsdt table in the 
> attachment, I can provide other tables if they are important.

I don't have much clues here. Are there any bios settings you could
tweak? Did you try without the nvidia driver loaded?

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Technology Center