[Linux 常見問題] Using XrandR to control video projector

Source From Here Preface This is the 2nd part of my entry of xrandr. I have written a previous entry Using xrandr to change screen resolution and orientation This blog entry essentially is to how how we can control monitor and projector. Note 1: Firstly do a query on the connected port (ie projector) # xrandr --query // You should be able to get your graphics output status whether it is VGA, HDMI etc Note 2: Setting the best resolution for the connected port (ie projector) # xrandr --output VGA --auto Note 3: Cloning mode for both internal monitor (DVI) and external projector (VGA) # xrandr --output VGA --mode 1024x768 --same-as DVI --output DVI --mode 1024x768 Note 4: Switching Off the Video Projector and turn off the Internal Monitor # xrandr --output VGA --off # xrandr --output DVI --auto