输入xrandr命令

hello@world-PC:~$ xrandr

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192

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

1920x1080     60.00 +  59.93    40.00

1680x1050     59.95    59.88

1600x1024     60.17

1400x1050     59.98

1280x1024     60.02

1440x900      59.89

1280x960      60.00

1360x768      59.80    59.96

1152x864      60.00

1024x768      60.04    60.00

960x720       60.00

928x696       60.05

896x672       60.01

960x600       60.00

960x540       59.99

800x600       60.00    60.32    56.25

840x525       60.01    59.88

800x512       60.17

700x525       59.98

640x512       60.02

720x450       59.89

640x480       60.00    59.94

680x384       59.80    59.96

576x432       60.06

512x384       60.00

400x300       60.32    56.34

320x240       60.05

VGA-1 disconnected (normal left inverted right x axis y axis)

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

1920x1080     60.00*+  59.94

1680x1050     59.88

1280x1024     75.02    60.02

1440x900      59.90

1280x960      60.00

1280x720      60.00    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

显示我的笔记本有三个接口，第一个“eDP-1”为笔记本屏幕，第二个“VGA-1”为笔记本VGA接口，我没有使用此接口，第三个“HDMI-1”为我连接外显示器使用的接口，故要关闭的显示选择找到要关闭屏幕的名称，我的是“eDP-1”

hello@world-PC:~$ sudo xrandr --output eDP-1 --off

关闭成功。