[Ubuntu] how to achieve dual display

A first direct run xrandr command to view information about the device:

Screen displays the current information of the connection device, after running below

PS: I have used HDMI cable to connect an external monitor and the host

wangju@wangju-HP-348-G4:~$ xrandr
Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm

 Description:

1.eDP-1 as the primary link interface

2.HDMI-1 is connected to the display interface

 Second, set up a dual-screen display:

 (1) Open the external display, dual display the same content - Cloning , (highest resolution Auto)

wangju@wangju-HP-348-G4:~$ xrandr --output HDMI-1 --same-as eDP-1 --auto

(2) Open the external monitor, set to the right extension

wangju@wangju-HP-348-G4:~$ xrandr --output HDMI-1 --right-of eDP-1 --auto

[note]

Note that, before use xrangr command to set the dual-screen, need to run a command to view xrandr VGA, LVDS and HDMI interface, and the interface connections correct name, as described above: eDP-1 and HDMI-1

 

Reference documents:

How to achieve dual display ubuntu