如何在 Ubuntu 上为双 GTX 设置双显示器
我正在设置 PC，配备一对 GeForce GTX 1070（均为 ASUS TURBO 1070）卡和一台通过 DP(GPU-0) 和 HDMI(GPU-1) 连接的飞利浦 246E FHD 显示器。PC 配置
DELL WorkStation Precision T7500（2009 或 2010 年制造）
CPU：X5690 * 2
内存：16GB * 12 (=192GB)
GPU：ASUS TURBO GTX 1070 * 2（不使用 SLI 电缆）
Ubuntu 显示管理器：gdm3
安装Ubuntu 20.04时，我检查了
·正常安装
·安装Ubuntu时下载更新
·安装图形和wifi硬件的第三方软件...
------图片：安装Ubuntu 检查设置------
我安装了 Ubuntu 20.04，然后重新启动，第二个显示器（连接到 GPU-1）无法工作。
------图片：第二台飞利浦显示器无法工作------
所以我设置了“NVIDIA X SERVER SETTINGS”，如下所示。
------图片：第一台显示器的 X 服务器设置------
------图片：第二台显示器的 X 服务器设置------
图片：第二台显示器的 X 服务器设置
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 440.82
Section "ServerLayout"
# Removed Option "Xinerama" "0"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" 1920 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Philips PHL 246E7"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Philips PHL 246E7"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 1070"
BusID "PCI:3:0:0"
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 1070"
BusID "PCI:4:0:0"
EndSection
Section "Screen"
# Removed Option "metamodes" "GPU-bb9972e4-0457-d2b7-c62f-9aa988ef66e4.GPU-0.DP-3: nvidia-auto-select +0+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}, GPU-850dc788-8ca1-f53b-5edd-54c338e6fed5.GPU-1.HDMI-1: nvidia-auto-select +1920+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}"
# Removed Option "BaseMosaic" "on"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-6"
Option "metamodes" "nvidia-auto-select +0+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-2"
Option "metamodes" "nvidia-auto-select +0+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On, AllowGSYNC=Off}"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
重新启动后，我仍然在一台显示器上看到 GNOME。然而，另一台显示器是黑屏，只有默认的 X 光标（右侧的发光只是显示器上的反射）：
------图片：第二台显示器上的 X 光标------
这是我的 nvidia-smi 信息。
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 440.100 Driver Version: 440.100 CUDA Version: 10.2 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 1070 Off | 00000000:03:00.0 On | N/A |
| 34% 64C P0 41W / 151W | 436MiB / 8118MiB | 2% Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX 1070 Off | 00000000:04:00.0 On | N/A |
| 24% 44C P8 7W / 151W | 53MiB / 8119MiB | 11% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 1103 G /usr/lib/xorg/Xorg 35MiB |
| 0 1707 G /usr/lib/xorg/Xorg 170MiB |
| 0 1917 G /usr/bin/gnome-shell 125MiB |
| 0 3201 G /usr/lib/firefox/firefox 2MiB |
| 0 3278 G /usr/lib/firefox/firefox 2MiB |
| 0 5499 G ...094687058528,131072 --disable-features= 36MiB |
| 0 5731 G /usr/lib/firefox/firefox 2MiB |
| 0 5774 G /usr/lib/firefox/firefox 2MiB |
| 0 5830 G /usr/lib/firefox/firefox 2MiB |
| 0 7789 G /usr/lib/firefox/firefox 12MiB |
| 0 7826 G /usr/lib/firefox/firefox 2MiB |
| 1 1103 G /usr/lib/xorg/Xorg 14MiB |
| 1 1707 G /usr/lib/xorg/Xorg 15MiB |
+-----------------------------------------------------------------------------+
我检查了这些网站作为参考。
https://askubuntu.com/questions/1194621/gnome-ignoring-second-monitor-ubuntu-19-10
4 个显示器，2 个 NVIDIA 显卡 - ubuntu 不工作
https://collaboradev.com/2016/09/30/arch-linux-Hydra-build/