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wulfspider

Member

From: Germany, Hesse, Darmstadt

Registered: 2015-05-05

Posts: 13

Turn off Nvidia GPU and use only Intel GPU

Hey guys,

I want to turn off the dedicated Nvidia GPU and I want to use only the integrated Intel GPU.

Some info about my notebook:
CPU: i7-6700HQ
IGP: Intel HD Graphics 530
Nvidia GPU: GeForce GTX 965M
Chipset: HM170 Express

There occur some Problems like blackscreens or like

[   15.445599] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[   15.445781] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train DP, aborting

On my desktop I have also an i7-6700 and the GPU works very well.

To be enable switching from Nvidia to Intel I have to change an option in the bios from "DISCRETE" to "MSHYBRID".
Theres another option, which I don't understand completely. It's called "GPU Porfomance Scaling". The description says "Enabled or Disabled NV GPU Perfamance Scaling support". I think it affects the Nvidia GPU and enables overclocking it.

So I read turning off the Nvidia GPU is possible with bbswitch or acpi_call. Which one is "better"?

Thanks in advance for your help

Last edited by wulfspider (2016-10-29 19:15:30)

Lekensteyn

Member

From: Netherlands

Registered: 2012-06-19

Posts: 192

Website

Re: Turn off Nvidia GPU and use only Intel GPU

Do not use acpi_call, it relies on you knowing which methods should be invoked and requires too much manual usage to make it work during system suspend/resume.

bbswitch would be an option, except that since kernel 4.8 you would have to boot with the kernel option pcie_pm_port=off as described at https://github.com/Bumblebee-Project/bb … issues/140

I would recommend the nouveau driver since this allows you to connect external monitors to your HDMI/miniDP ports later. With mesa 13 installed, you additionally wants to patch libdrm though to avoid waking the GPU at every program start: https://lwn.net/Articles/705423/

Finally, from the description it sounds like you have a Clevo P6xxRA laptop. This model (and others) have an issue that result in a lockup once you power on the GPU again. Until a solution is found, try an appropriate (model-specific!) workaround from this list: https://github.com/Bumblebee-Project/Bu … -234494238