On Wed, 5 Sep 2018 14:46:54 +0200
Thierry de Coulon <tcoulon@...> wrote:

> I have a notebook that I connect to my school beamer with a HDMI cable.
> 
> In Trinity Control Center I can see both my laptop screen and the HDMI
> screen. I cannot use it if I don't "extend the desktop" to it, but then
> all my apps open stretched overt the two and control is very difficult.
> 
> I can set the external screen to the same resolution as the internal, but 
> there is no option to just mirror the internal screen on the external.
> 
> Am I missing some black magic?
> 

xrandr --output HDMI1 --same-as LVDS1

change the names of outputs according to what xrandr shows.


-- 
  Nick Koretsky (nick.koretsky@...)