[coreboot] Problems with NVidia on Lenovo ThinkPad T430

[Tobias Dausend]

Hey Christoph,

I had also a first tryout with the UEFItool and had one ROM extracted.
But afterwards did this with PhoenixTool and got two ROMs with the same
size. Thanks for the hint afterwards, because one ROM seems not working
after all. I'll have a look in the dumped list from PhoenixTool.

Have you used the stable version?

Best regards,
Tobias Dausend.


Am 04.04.2018 um 15:25 schrieb Christoph Pomaska:
> Hi Tobias,
>
> I used UEFItool to extract the Nvidia option ROM, that wiki page under
> "UEFI method":
>
> https://www.coreboot.org/VGA_support
>
> On the T430 I found two blobs, one of about 60k in size and one that's
> about double the size, but I wasn't able to properly test yet which
> one is needed.
>
> Best regards
> Christoph Pomaska / Sellerie
>
> Am 4. April 2018 12:41:35 nachm. schrieb Tobias Dausend
> <t.dausend at openmails.org>:
>
> Hello Tobias,
>
> You can switch between GPUs by changing the value of the
> hybrid_graphics_mode CMOS setting using nvramcui or nvramtool.
> Currently, for the T430 this field can be set to either Integrated only
> or Dedicated only. Make sure you are using CMOS for configuration
> values. Unfortunately, I was unable to switch the power for the dGPU
> off at all, which resulted in rather high power consumption even if
> only the integrated GPU is enabled.
>
> Regards,
> Micha? Kope?
> Hello,
>
> thanks for the feedback. What version of Coreboot did you use? Is the
> stable 4.7 enough or should I use a snapshot from the git-repository?
> Also the question how to include the VGA-bios for the NVidia-card. I did
> a compilation with the VGA-bios for Intel and included the rom
> afterwards with cbfstool. Is this the correct way to do as "optional
> rom"?
>
> Thanks!
>
> Regards,
> Tobias.
>
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