ACPI

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ACPI allows control of power management from within the operating system.

A group working towards less power consumption in Linux LessWatts.org

Info about turn off discrete GPU acpi_call.ko

GPU

Atom D510

I tried to turn off GPU on Atom D510 core.

I got this reply from the LessWatts organisation:

There's no generic ACPI mechanism for this. Some machines with dual GPUs have ACPI methods for turning the discrete controller on and off, but in general you'd be looking at doing this from the GPU driver.

According to Atom D510 datasheet http://www.intel.com/content/dam/doc/datasheet/atom-d400-d500-vol-1-datasheet.pdf runing system without display is still viable

External links