Kubuntu双显示器搭配KVM切换器随机黑屏问题排查求助

大家好，我遇到了一个困扰已久的问题，想在这里请教下有没有朋友遇到过类似情况，或者能给我一些排查思路。

系统与硬件配置 #

我使用的是ThinkPad笔记本，通过KVM切换器连接了两台显示器：一台通过HDMI线连接，另一台通过DP线连接，笔记本自带屏幕已经在系统设置中禁用。当前运行的是Kubuntu 23.10，使用系统默认的显示配置工具。

问题描述 #

目前遇到的问题是，两台显示器会随机出现黑屏情况：有时候是其中一台黑屏，有时候是另一台，偶尔还会两台同时黑屏。重启系统能暂时解决问题，但过段时间又会复发，严重影响日常使用。

已尝试的解决方法 #

我试过用arandr工具手动配置显示布局，但问题依然存在，现在实在不知道该从哪里入手排查了。

硬件与显示输出信息 #

我运行了lspci ; xrandr命令，输出内容如下（而且在运行命令的几秒内，副屏还出现了一次黑屏）：

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)

00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)

00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)

00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)

00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)

00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)

00:1c.3 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #4 (rev f1)

00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1)

00:1f.0 ISA bridge: Intel Corporation Sunrise Point-LP LPC Controller (rev 21)

00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)

00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)

00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)

00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-V (rev 21)

03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)

04:00.0 Non-Volatile memory controller: Intel Corporation SSD 600P Series (rev 03)

Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384

eDP-1 connected (normal left inverted right x axis y axis)

1920x1080     60.02 +  60.02    48.01

1680x1050     60.02

1400x1050     60.02

1600x900      60.02

1280x1024     60.02

1400x900      60.02

1280x960      60.02

1440x810      60.02

1368x768      60.02

1280x800      60.02

1280x720      60.02

1024x768      60.02

960x720       60.02

928x696       60.02

896x672       60.02

1024x576      60.02

960x600       60.02

960x540       60.02

800x600       60.02

840x525       60.02

864x486       60.02

700x525       60.02

800x450       60.02

640x512       60.02

700x450       60.02

640x480       60.02

720x405       60.02

684x384       60.02

640x360       60.02

512x384       60.02

512x288       60.02

480x270       60.02

400x300       60.02

432x243       60.02

320x240       60.02

360x202       60.02

320x180       60.02

HDMI-1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 598mm x 336mm

1920x1080     60.00*+  50.00    59.94

1680x1050     59.88

1600x900      60.00

1280x1024     75.02    60.02

1440x900      59.90

1280x800      59.91

1152x864      75.00

1280x720      60.00    50.00    59.94

1024x768      75.03    70.07    60.00

832x624       74.55

800x600       72.19    75.00    60.32    56.25

720x576       50.00

720x480       60.00    59.94

640x480       75.00    72.81    66.67    60.00    59.94

720x400       70.08

DP-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm

1920x1080     60.00*+  50.00    59.94

1680x1050     59.88

1600x900      60.00

1280x1024     75.02    60.02

1440x900      59.90

1280x800      59.91

1152x864      75.00

1280x720      60.00    60.00    50.00    59.94

1024x768      75.03    70.07    60.00

832x624       74.55

800x600       72.19    75.00    60.32    56.25

720x480       60.00    59.94

640x480       75.00    72.81    66.67    60.00    59.94

720x400       70.08

HDMI-2 disconnected (normal left inverted right x axis y axis)

有没有朋友在Kubuntu环境下使用双显示器加KVM切换器时遇到过类似的随机黑屏问题？有没有针对性的排查步骤或者替代配置方案能解决这个问题？任何建议或见解我都非常感激！

谢谢大家！

备注：内容来源于stack exchange，提问作者drozas