无法将鼠标指针移动到其他屏幕

Question

我无法将鼠标指针移到另一个显示器。我有 3 个显示器设置，此输出可能包含一些有用的信息：

pc:~$ xrandr
Screen 0: minimum 8 x 8, current 5760 x 1080, maximum 8192 x 8192
DVI-I-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1920x1080+3840+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+  59.94    50.00    60.00    50.04  
   (... Removed output just to decrease in size)
HDMI-1-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+
   (... Removed output just to decrease in size)
HDMI-1-2 disconnected (normal left inverted right x axis y axis)
DP-1-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+
   (... Removed output just to decrease in size)

我已经安装了新的 Kubuntu：

pc:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 19.04
Release:        19.04
Codename:       disco

看起来是这样的，我可以在另一个屏幕上看到鼠标的某些部分，但它只是没有继续移动。