Displaying a program on 2 screens at the same time

[Jason Spatafore]

Brian,

For your dual monitor situation, are you using a single head (1 video 
card) or dual head (2 video cards)?

Keep in mind I'm talking cards, not ports on the cards. (Video cards can 
have multiple ports. Mine has 2 x HDMI and 1 x DVI)

Attached is a screenshot using Impress on a single head configuration 
with dual monitors. Notice one monitor is the actual presentation (right 
side) and the other monitor is the presenter's screen (left side).

I accomplished this by pressing the F5 key (which is the key to start 
the presentation).

Now, the reason for the question. When you run a dual head 
configuration, it gets really tricky to extend desktops between the 
heads. This gets especially wonky with nVidia cards, and it 
architecturally makes sense on why there's a limitation (memory space). 
The only way I've worked around it was to run two desktops, one on each 
head. And I was only able to accomplish that successfully using XFCE. 
Gnome and KDE didn't play well with multiple head configurations for me.

I hope this helps. I run Ubuntu 18.04 and the screenshot attached was a 
default install allowing Ubuntu to set the dual monitor configuration. I 
can likely exchange some config files with you if you wanted to explore 
how it self configured. I can say with this setup, I can run steam games 
on one monitor while watching Netflix on the other (which is the typical 
style of use for multiple monitors). And as you can see, Impress will 
allow me to have a presenter screen and slide show screen.


On 2/16/19 12:38 PM, Brian Cluff wrote:
> For those of you that saw my Hugin presentation at last Thursday's 
> meeting you would have noticed that I had some difficulty switching 
> back and forth between the presentation and doing a demo of the software.
>
> The reason for this is that I was running Libreoffice Impress in dual 
> monitor mode so that I can see my notes and the next slide. I could 
> solve the problem by just mirroring the display, but that causes 
> problems by eliminating my notes and other resources. There is also 
> the possibility of using a tablet to control the presentation, but 
> that might not be reliable at SCaLE when I do the presentation again.
>
> So what I need is a way to display a program on both monitors at the 
> same time without having to mirror the display.
>
> I think I might have a workable solution by abusing the kmag program 
> and setting it's magnification to 1:1, but I wonder if there is a 
> better or more purpose built solution to accomplish the same thing.  
> If there is, great, I'd love to hear about it, if there isn't then 
> this message can serve as a possible solution for others to increase 
> the quality of their presentations.
>
> Brian Cluff
>
>
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