我只是坚持使用另一个 GPU 来运行两个屏幕。
$ lspci | grep VGA
02:00.0 VGA compatible controller: NVIDIA Corporation G86 [GeForce 8500 GT] (rev a1)
03:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)
但运行 xrandr 我只看到第一个：
$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1200, maximum 8192 x 8192
DVI-I-0 disconnected (normal left inverted right x axis y axis)
VGA-0 disconnected (normal left inverted right x axis y axis)
TV-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 60.0*+
1680x1050 60.0
1600x1200 60.0
1440x900 75.0 59.9
1280x1024 75.0 60.0
1280x800 74.9 59.8
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 59.9
运行 gksudo nvidia-settings 时我只看到一个 GPU。
我在 nvidia 驱动程序中发现了一些关于启用两个 GPU 的信息，因此我尝试了这个：
$ sudo nvidia-xconfig -a
Using X configuration file: "/etc/X11/xorg.conf".
NVIDIA: could not open the device file /dev/nvidia1 (Input/output error).
WARNING: Unable to use the nvidia-cfg library to query NVIDIA hardware.
ERROR: Unable to determine number of GPUs in system; cannot honor '--enable-all-gpus' option.
Backed up file '/etc/X11/xorg.conf' as '/etc/X11/xorg.conf.backup'
New X configuration file written to '/etc/X11/xorg.conf'
非常感谢您的帮助！
答案1
您应该使用修改后的 xorg.conf，在其中将两个 GPU 插入为“设备部分”，然后通过“监视器部分”和“屏幕部分”将显示器绑定到不同的 GPU。有关更多信息，我推荐这篇文章（https://wiki.archlinux.org/index.php/xorg_multiseat) 也适用于 Ubuntu，您只需更改“输入”部分，这样您就不会获得“真正的”多席位。我会使用类似以下内容来代替提供的“ServerFlags”部分：
“服务器布局”部分
Identifier "MainDisplay"
Screen "screen0" 0 0 for your first display, depending on how you named the section
Screen "screen1" 0 1 #for your second display, depending on how you named the section
InputDevice "mouse0" "CorePointer" #change it to your mouse identifier
InputDevice "keyboard0" "CoreKeyboard" #change it to your keyboard identifier
Option "Clone" "off"
结束部分
您应该编辑自动生成的 xorg.conf，而不是创建新的 xorg.conf。