Sup,

-> f8 on my Thinkpad W530

On 05.04.19 20:21, Patrick Rudolph wrote:
> Hi folks,
> In order to add Nvidia Optimus support on Lenovo laptops, I'm trying
> to fix the last issues on [1], but I need your help to do some test on
> Lenovo's firmware.
> On Lenovo Sandy Bridge / Ivy Bridge series the PMH7 register 0x50
> controls dGPU power.
> Comments on Gerrit show that different bits on different generations
> are used.
>
> Please use util/pmh7tool on vendor firmware with Optimus enabled and
> graphics driver loaded:
>
> $ ./pmh7tool -r 0x50
>
> To wake the GPU from sleep, you can simply run lspci, or a graphical
> 3D application.
> It will go back to sleep after a few seconds of idle.
>
> Please report which bits toggle and the device you run tests on.
> It will help to add proper Nvidia Optimus support to all Lenovo laptops.
>
>
> 1: https://review.coreboot.org/#/c/coreboot/+/28380/
>
> Regards,
> Patrick
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