Ubuntu - Intel 和 NVIDIA 显卡间的切换

1) 安装 

先到 Additional Drivers 
将 NVIDIA binary driver - version 381.22 from nvidia-381 安装了

可以用命令检查到是否安装了 nvidia-381

$ su 

$ apt-get search nvidia-381

$ apt-get install nvidia-prime
$ prime-select intel

$ add-apt-repository ppa:bumblebee/testing
$ apt-get update
$ apt-get install bumblebee

$ add-apt-repository ppa:nilarimogard/webupd8
$ apt-get update
$ apt-get install prime-indicator-plus

2) 设置 (如果有更新, 以下的设置也要改)

2.1) 确保这个文件有 nvidia-381 的设置

$ gksu gedit /etc/modprobe.d/bumblebee.conf

# 381
blacklist nvidia-381
blacklist nvidia-381-updates
blacklist nvidia-experimental-381

2.2) 设置用 nvidia-381

$ gksu gedit /etc/bumblebee/bumblebee.conf

TurnCardOffAtExit=true

Driver=nvidia
KernelDriver=nvidia-381
LibraryPath=/usr/lib/nvidia-381:/usr/lib32/nvidia-381
XorgModulePath=/usr/lib/nvidia-381/xorg,/usr/lib/xorg/modules

3) 检查 BusID

$ sudo update-pciids
$ lspci | egrep 'VGA|3D'

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 640M] (rev a1)

4) 设置

$ gksu gedit /etc/bumblebee/xorg.conf.nvidia

Section "ServerLayout"
    Identifier  "Layout0"
    Option      "AutoAddDevices" "false"
    Option      "AutoAddGPU" "false"
EndSection

Section "Device"
    Identifier  "DiscreteNvidia"
    Driver      "nvidia"
    VendorName  "NVIDIA Corporation"

    BusID "PCI:01:00:0"
    Option "ProbeAllGpus" "false"

    Option "NoLogo" "true"
    Option "UseEDID" "false"
    Option "UseDisplayDevice" "none"
EndSection

5) 重启

$ optirun -b none /usr/bin/nvidia-settings  -c :8

可以在 PRIME indicator 上知道系统在用哪一个显卡, 而且可以自由切换
也可以在以下切换

NVIDIA X Server Settings - PRIME Profiles 
- NVIDIA (Performance Mode) 或 Intel (Power Saving Mode)

然后 Log out, 再登入..