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
1 Screen 0: minimum 320 x 200, current 1600 x 900, maximum 16384 x 16384 2 eDP-1 connected 1368x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm 3 1920x1080 60.02 + 60.01 59.97 59.96 59.93 4 1680x1050 59.95 59.88 5 1600x1024 60.17 6 1400x1050 59.98 7 1600x900 59.99 59.94 59.95 59.82 8 1280x1024 60.02 9 1440x900 59.89 10 1400x900 59.96 59.88 11 1280x960 60.00 12 1440x810 60.00 59.97 13 1368x768 59.88* 59.85 14 1360x768 59.80 59.96 15 1280x800 59.99 59.97 59.81 59.91 16 1152x864 60.00 17 1280x720 60.00 59.99 59.86 59.74 18 1024x768 60.04 60.00 19 960x720 60.00 20 928x696 60.05 21 896x672 60.01 22 1024x576 59.95 59.96 59.90 59.82 23 960x600 59.93 60.00 24 960x540 59.96 59.99 59.63 59.82 25 800x600 60.00 60.32 56.25 26 840x525 60.01 59.88 27 864x486 59.92 59.57 28 800x512 60.17 29 700x525 59.98 30 800x450 59.95 59.82 31 640x512 60.02 32 720x450 59.89 33 700x450 59.96 59.88 34 640x480 60.00 59.94 35 720x405 59.51 58.99 36 684x384 59.88 59.85 37 680x384 59.80 59.96 38 640x400 59.88 59.98 39 576x432 60.06 40 640x360 59.86 59.83 59.84 59.32 41 512x384 60.00 42 512x288 60.00 59.92 43 480x270 59.63 59.82 44 400x300 60.32 56.34 45 432x243 59.92 59.57 46 320x240 60.05 47 360x202 59.51 59.13 48 320x180 59.84 59.32 49 HDMI-1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 476mm x 268mm 50 1920x1080 60.00 + 59.94 51 1600x900 60.00* 52 1280x1024 75.02 60.02 53 1152x864 75.00 54 1280x720 60.00 59.94 55 1024x768 75.03 60.00 56 800x600 75.00 60.32 57 720x480 60.00 59.94 58 640x480 75.00 60.00 59.94 59 720x400 70.08 60 DP-1 disconnected (normal left inverted right x axis y axis) 61 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
相关参数：--left-of, --right-of, --above, --below, --same-as
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