notebook run ubuntu 15.04 is too hot

1、run terminal by root user

2、add follow text to file /etc/rc.local in front of "exit 0"

    echo IGD > /sys/kernel/debug/vgaswitcheroo/switch

    echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

 

The first one is to switch to the integrated graphics;

The second sentence is to turn off unconnected video card.

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