deepin 扩展屏幕设置

1、首先用xrandr看一下

xrandr
Screen 0: minimum 8 x 8, current 3200 x 1080, maximum 16384 x 16384
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
eDP-1-1 connected primary 1920x1080+1280+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1920x1080     60.10*+  60.01    59.97    59.96    59.93  
   1680x1050     59.95    59.88  
   ...
DP-1-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 340mm x 270mm
   1280x1024     75.02*+  70.00    60.02  
       ...
HDMI-1-1 disconnected (normal left inverted right x axis y axis)

2、显示正在使用的有两个显示器，eDP-1-1（主屏幕）和DP-1-1（副屏幕，我放左边）

xrandr --output DP-1-1 --left-of eDP-1-1 --auto

3、这种设置开机后会变化，所以推荐在设置里面更改