[coreboot] Problems with NVidia on Lenovo ThinkPad T430

Michał Kopeć mkopec12 at gmail.com
Wed Apr 4 15:20:25 CEST 2018

> > 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.


I'm currently using the latest Git snapshot on my machine. I also 
compiled with the Intel option rom and added the nvidia option rom 
using cbfstool after, like you did. I haven't tried 4.7, so I couldn't 
tell you how it works there.

Michał Kopeć

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