ubuntu 连接双显示器

我的是双显卡, 单显卡应该也适用
两个显示器的输入线同时插在主显卡我最右边两个口就可以了(每个显卡自带4个插口, 3个DP, 一个HDMI), 我一个插的DP接口,另一个插得的HDMI

使用命令查看连接情况:

$ xrandr
Screen 0: minimum 8 x 8, current 3840 x 1449, maximum 32767 x 32767
HDMI-0 connected 1920x1080+1920+369 (normal left inverted right x axis y axis) 509mm x 286mm
   1920x1080     60.00*+  59.94  
   1680x1050     59.95  
   1440x900      74.98    59.89  
   1280x1024     75.02    60.02  
   1280x720      60.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x480       59.94    59.94  
   640x480       75.00    72.81    59.94  
DP-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm
   1920x1080     60.00*+
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1152x864      75.00  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   640x480       75.00    59.94  
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)