我设置了两台显示器 - 均插入 NVIDIA GeForce GTX 970。我的主显示器使用显示端口 (Acer)，另一个使用 HDMI (三星)。
一切正常，直到我进行系统更新，现在只有插入显示端口的主显示器似乎可以工作。
我研究了以下内容：
在 GNOME 3 设置 > 设备 > 显示中。这里只显示我的主显示器。以前，我可以看到两台显示器。
xrandr -q 的输出
xrandr -q
xrandr: Output HDMI-0 is not disconnected but has no modes
Screen 0: minimum 8 x 8, current 3840 x 2160, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected (normal left inverted right x axis y axis)
DP-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 621mm x 341mm
3840x2160 60.00*+ 24.00
DP-1 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
我查看了 NVIDIA X 服务器设置。在“X 服务器显示配置”中，我可以看到第二个显示器，但是当我单击它时，它显示“配置：已禁用”。我尝试将配置更改为“新 X 屏幕”，但这似乎在 X 重新启动后没有执行任何操作。当我尝试“保存到 X 配置文件”时，这就是预览提供的内容。没有提到三星显示器
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 450.80.02
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 450.80.02
Section "ServerLayout"
# Removed Option "Xinerama" "1"
# Removed Option "Xinerama" "1"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
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 "Acer XB280HK"
HorizSync 30.0 - 140.0
VertRefresh 30.0 - 70.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 970"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-2"
Option "metamodes" "DP-0: nvidia-auto-select +0+0"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
当我将电脑启动到 Windows 端时，两台显示器都可以正常工作，并且我尝试拔掉显示器的插头，因此我相当有信心这不是连接问题。
感谢您的帮助！
编辑附加信息：
百胜历史显示：
没有 nvidia 更新
xorg 更新
Upgrade xorg-x11-drv-ati-19.1.0-1.el8.x86_64 @AppStream
Upgrade xorg-x11-drv-intel-2.99.917-39.20200205.el8.x86_64 @AppStream
Upgrade xorg-x11-proto-devel-2020.1-3.el8.noarch @AppStream
Upgrade xorg-x11-server-Xorg-1.20.8-6.el8.x86_64 @AppStream
Upgrade xorg-x11-server-Xvfb-1.20.8-6.el8.x86_64 @AppStream
Upgrade xorg-x11-server-Xwayland-1.20.8-6.el8.x86_64 @AppStream
Upgrade xorg-x11-server-common-1.20.8-6.el8.x86_64 @AppStream
Upgrade xorg-x11-xkb-utils-7.7-28.el8.x86_64 @AppStream
Upgraded xorg-x11-drv-ati-19.0.1-2.el8.x86_64 @@System
Upgraded xorg-x11-drv-intel-2.99.917-38.20180618.el8.x86_64 @@System
Upgraded xorg-x11-proto-devel-2018.4-1.el8.noarch @@System
Upgraded xorg-x11-server-Xorg-1.20.6-3.el8.x86_64 @@System
Upgraded xorg-x11-server-Xvfb-1.20.6-3.el8.x86_64 @@System
Upgraded xorg-x11-server-Xwayland-1.20.6-3.el8.x86_64 @@System
Upgraded xorg-x11-server-common-1.20.6-3.el8.x86_64 @@System
Upgraded xorg-x11-xkb-utils-7.7-27.el8.x86_64 @@System
内核更新
Install kernel-4.18.0-240.1.1.el8_3.x86_64 @BaseOS
Install kernel-core-4.18.0-240.1.1.el8_3.x86_64 @BaseOS
Install kernel-devel-4.18.0-240.1.1.el8_3.x86_64 @BaseOS
Install kernel-modules-4.18.0-240.1.1.el8_3.x86_64 @BaseOS
Upgrade texlive-l3kernel-7:20180414-19.el8.noarch @AppStream
Upgrade kernel-abi-whitelists-4.18.0-240.1.1.el8_3.noarch @BaseOS
Upgrade kernel-headers-4.18.0-240.1.1.el8_3.x86_64 @BaseOS
Upgrade kernel-tools-4.18.0-240.1.1.el8_3.x86_64 @BaseOS
Upgrade kernel-tools-libs-4.18.0-240.1.1.el8_3.x86_64 @BaseOS
Upgraded kernel-4.18.0-193.el8.x86_64 @@System
Upgraded kernel-core-4.18.0-193.el8.x86_64 @@System
Upgraded kernel-modules-4.18.0-193.el8.x86_64 @@System
Upgraded texlive-l3kernel-7:20180414-14.el8.noarch @@System
Upgraded kernel-abi-whitelists-4.18.0-193.28.1.el8_2.noarch @@System
Upgraded kernel-headers-4.18.0-193.28.1.el8_2.x86_64 @@System
Upgraded kernel-tools-4.18.0-193.28.1.el8_2.x86_64 @@System
Upgraded kernel-tools-libs-4.18.0-193.28.1.el8_2.x86_64 @@System