[coreboot] Fwd: Thinkpad W520 external monitor over Nvdia GPU

[kinky_nekoboi]

i did this ... but i named the 2000M vbios rom 2000m.rom ... i fetched
the vbios from another side because i cound not extract it with uefitool.

I cannot get any output on VGA/Displayport ... also if i choose the
NVram option "discret only" i get a black screen.

any help?


Am 30.09.2018 um 18:32 schrieb Evgeny Zinoviev:
> On 09/30/2018 02:33 PM, kinky_nekoboi wrote:
>
>> thanks i will try to buile a rom from master tree than.
>> is there any tutorial to insert the right vgabioses into the rom
> 1. Extract VGA ROM from your UEFI dump as explained here:
> https://www.coreboot.org/Intel_Sandybridge_Build_Tutorial#Nvidia_Option_ROM
> 2. Run `lspci -nn` on your machine with dGPU enabled, you can do that
> under Lenovo BIOS or under latest coreboot with CMOS option
> "hybrid_graphics_mode" set to "Dual Graphics" (the PCI device is not
> hidden in this case).
> 3. Add VGA ROM to coreboot image: `cbfstool build/coreboot.rom add -t
> optionrom -n pci10de,0ffc.rom -f vgabios.rom`, where 10de is the vendor
> id and 0ffc is the device id of your GPU.
>
> AFAIK the nvidia driver doesn't work at the moment but you can use
> nouveau. Optimus is not supported officially yet but is sort of
> available: https://review.coreboot.org/#/c/coreboot/+/28380/
>