ubuntu下關閉獨立顯卡

tang@ubuntu:~$ sudo su
[sudo] password for tang: 

能夠先查看顯卡的狀態

root@ubuntu:/home/tang# cat /sys/kernel/debug/vgaswitcheroo/switch 

0:IGD:+:Pwr:0000:00:02.0

1:DIS: :Pwr:0000:01:00.0

root@ubuntu:/home/tang# echo IGD > /sys/kernel/debug/vgaswitcheroo/switch 
root@ubuntu:/home/tang# echo OFF > /sys/kernel/debug/vgaswitcheroo/switch 
root@ubuntu:/home/tang# cat /sys/kernel/debug/vgaswitcheroo/switch 
0:IGD:+:Pwr:0000:00:02.0

1:DIS: :Off:0000:01:00.0

這樣就能夠了