Y460 disable the exclusive method in ubuntu

Y460 disable the exclusive display method under ubuntu recently found that y460 installed ubuntu, the temperature is very high, the fan turned very loud. If you want to turn off the dedicated display and turn it into an integrated video card, the fan will have almost no sound. Because kernel Versions later than 2.6.37 can directly support dual-graphics switching, it is quite simple. The following describes the specific steps: 1. first enter root User Permissions su 2. switch the video card to the integrated graphics card echo IGD>/sys/kernel/debug/vgaswitcheroo/switch 3. disable integrated graphics echo OFF>/sys/kernel/debug/vgaswitcheroo/switch and check whether the command is successfully executed. Run the following command: after cat/sys/kernel/debug/vgaswitcheroo/switch is successful, 0: IGD: +: Pwr: 0000: 00: 02.01: DIS: Off: 0000: 01: 00.02: DIS-Audio: Off: 0000: 01: 00.1 the sound of the sound fan will be much smaller after the success, which can also be used as a basis for judgment. If you want to take effect after each boot, add the preceding switch statement to the boot script. The specific steps are as follows: 1. first enter root User Permissions su 2. then modify/etc/rc. local adds echo IGD>/sys/kernel/debug/vgaswitcheroo/switchecho OFF>/sys/kernel/debug/vgaswitcheroo/switch 3 to exit 0 of the file. save the changes.