我无法让 GDM 使用我的所有屏幕。我的硬件连接如下：
Nvidia 专有驱动程序 440.26
RTX 2070 super：
- DP：1080p@144显示器
GTX 670：
- DVI：1080@60显示器
- DVI：1080@60显示器
- HDMI：4k@60电视
看起来 xorg 配置很稳定（见视频），但是 gnome 和 xrandr 没有考虑其他显示器。
视频：https://s1.webmshare.com/3jAB8.webm
Gnome 桌面仅显示在主显示器上，但我可以在所有显示器上正确移动光标。当光标移动到“辅助”显示器时，光标会变为 X。无法将窗口拖到其他显示器上，但可以使用DISPLAY=:0.1 xclock &
这是我的 xorg.conf：
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 440.26
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 1920 2160
Screen 1 "Screen1" LeftOf "Screen0"
Screen 2 "Screen2" RightOf "Screen0"
Screen 3 "Screen3" Above "Screen0"
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 "BenQ XL2420G"
HorizSync 30.0 - 160.0
VertRefresh 30.0 - 150.0
Option "DPMS"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Ancor Communications Inc ASUS VS247"
HorizSync 24.0 - 83.0
VertRefresh 50.0 - 75.0
Option "DPMS"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor2"
VendorName "Unknown"
ModelName "Ancor Communications Inc ASUS VS247"
HorizSync 24.0 - 83.0
VertRefresh 50.0 - 75.0
Option "DPMS"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor3"
VendorName "Unknown"
ModelName "SAMSUNG"
HorizSync 15.0 - 135.0
VertRefresh 24.0 - 75.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce RTX 2070 SUPER"
BusID "PCI:1:0:0"
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 670"
BusID "PCI:2:0:0"
Screen 0
EndSection
Section "Device"
Identifier "Device2"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 670"
BusID "PCI:2:0:0"
Screen 1
EndSection
Section "Device"
Identifier "Device3"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 670"
BusID "PCI:2:0:0"
Screen 2
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-3"
Option "metamodes" "1920x1080_144 +0+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On, AllowGSYNC=Off}"
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 "metamodes" "DVI-I-1: 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
Section "Screen"
Identifier "Screen2"
Device "Device2"
Monitor "Monitor2"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-3"
Option "metamodes" "DVI-D-0: 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
Section "Screen"
Identifier "Screen3"
Device "Device3"
Monitor "Monitor3"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "HDMI-0: 3840x2160 +0+0 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On, AllowGSYNC=Off}"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
这似乎与这个问题是同一个问题：Gnome 忽略第二台显示器 Ubuntu 19.10
我尝试了回复中列出的建议故障排除步骤，但没有成功。当我启用 Xinerama 时，我的主显示器左上角出现一个不闪烁的“_”光标，重新启动后什么都没有。
将我的情况与参考问题区分开来的一个重要因素是，当使用类似的设置（使用 980 ti 和我的集成显卡）时，我可以毫无问题地让 gnome 识别我的所有显示器。
这是该设置的 xorg.conf (intel/nvidia)：
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 418.56
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 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 "BenQ XL2420G"
HorizSync 30.0 - 160.0
VertRefresh 30.0 - 150.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor2"
VendorName "Unknown"
Option "DPMS"
EndSection
Section "Monitor"
Identifier "SamsungTV"
VendorName "Samsung"
Option "DPMS"
EndSection
Section "Device"
Identifier "nvidia0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 980 Ti"
BusID "PCI:1:0:0"
EndSection
Section "Device"
Identifier "intel0"
Driver "intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "TripleBuffer" "true"
BusID "PCI:0:2:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "nvidia0"
Monitor "Monitor0"
DefaultDepth 24
Option "nvidiaXineramaInfoOrder" "DFP-2"
Option "metamodes" "1920x1080 +1920+2160 {ViewPortIn=1920x1080, ViewPortOut=1920x1080+0+0, ForceFullCompositionPipeline=On}"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen3"
Device "nvidia0"
Monitor "SamsungTV"
DefaultDepth 24
Option "metamodes" "3840x2160 +950+0 {ViewPortIn=3840x2160, ViewPortOut=3840x2160+0+0, ForceFullCompositionPipeline=On}"
Option "TripleBuffer" "on"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "intel0"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen2"
Device "intel0"
Monitor "Monitor2"
DefaultDepth 24
SubSection "Display"
Depth 24
EndSubSection
EndSection
有什么建议么？