linux 设置双显示器

1.查看显示器

xrandr

结果如下，有两个显示器：主显示器eDP-1 与  外接显示器HDMI-1

Screen 0: minimum 320 x 200, current 1600 x 900, maximum 16384 x 16384
eDP-1 connected 1368x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1920x1080     60.02 +  60.01    59.97    59.96    59.93
   1680x1050     59.95    59.88
   1600x1024     60.17
   1400x1050     59.98
   1600x900      59.99    59.94    59.95    59.82
   1280x1024     60.02
   1440x900      59.89
   1400x900      59.96    59.88
   1280x960      60.00
   1440x810      60.00    59.97
   1368x768      59.88*   59.85
   1360x768      59.80    59.96
   1280x800      59.99    59.97    59.81    59.91
   1152x864      60.00
   1280x720      60.00    59.99    59.86    59.74
   1024x768      60.04    60.00
   960x720       60.00
   928x696       60.05
   896x672       60.01
   1024x576      59.95    59.96    59.90    59.82
   960x600       59.93    60.00
   960x540       59.96    59.99    59.63    59.82
   800x600       60.00    60.32    56.25
   840x525       60.01    59.88
   864x486       59.92    59.57
   800x512       60.17
   700x525       59.98
   800x450       59.95    59.82
   640x512       60.02
   720x450       59.89
   700x450       59.96    59.88
   640x480       60.00    59.94
   720x405       59.51    58.99
   684x384       59.88    59.85
   680x384       59.80    59.96
   640x400       59.88    59.98
   576x432       60.06
   640x360       59.86    59.83    59.84    59.32
   512x384       60.00
   512x288       60.00    59.92
   480x270       59.63    59.82
   400x300       60.32    56.34
   432x243       59.92    59.57
   320x240       60.05
   360x202       59.51    59.13
   320x180       59.84    59.32
HDMI-1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 476mm x 268mm
   1920x1080     60.00 +  59.94
   1600x900      60.00*
   1280x1024     75.02    60.02
   1152x864      75.00
   1280x720      60.00    59.94
   1024x768      75.03    60.00
   800x600       75.00    60.32
   720x480       60.00    59.94
   640x480       75.00    60.00    59.94
   720x400       70.08
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)

2.主显示器和外接显示器同内容

xrandr --output HDMI-1 --same-as eDP-1 --auto

3.右扩展外接显示器

设置 HDMI-1为eDP-1的右扩展屏

xrandr --output HDMI-1 --right-of eDP-1 --auto

相关其他参数：--left-of, --right-of, --above, --below, --same-as  ,如把主显示器显示在外接显示器下面

xrandr --output eDP-1 --below HDMI-1

4.设置外接显示器为竖屏

xrandr --output HDMI-1 --rotate left

　　相关参数 'normal', 'left', 'right' or 'inverted'

5.只用外接显示器

xrandr --output HDMI-1 --auto --output eDP-1 --off

6.设置外接显示器为主显

这里设置外接显示器为主显示器

xrandr --output HDMI-1 --primary

7.左扩展显示器

在上一步的基础上，可以设置笔记本显示器为外接显示器的左扩展

xrandr --output eDP-1 --left-of HDMI-1