Can I disable the primary screen of the laptop and use only tv?

Hello, I have a laptop without hdmi. Currently, I use lubuntu 16.04 and, I have installed KODI. My laptop doesnt have hdmi but, it has DVI and then, I connect the laptop to the HDMI of the television through an adapter, DVI to HDMI. It works very well, i can see lubuntu and kodi in the TV and, I can disable lapto's screen and, I only use the tv like primary screen. Everything works.
The problem is when I try use libreelec.
When I try use libreelec, I cant disable the primary screen, which is laptop's screen and I cant use chromium for libreelec, for example. because chromium open in laptop. Another problem is, when I choose video through DVI and I choose resolution ( I choose 1080p) There is no signal in my TV 4k but, If I use another monitor whose maximum resolution is 1080p, there is signal. In lubuntu, in resolution 1080p, i have signal in mi tv 4k. I dont know why, with libreelec, i have no signal.
I think if I am able to choose TV like primary screen and disable laptop's screen, it could work, but i dont know how to disable.

Anyone have any idea? Sorry for my bad english. And thank you for everything.

Quote from Klojum

There should be an option called "Blank other displays". You may have to adjust the Kodi menu Setting Level in the bottom left to"Advanced" or "Expert".

I think that i tryed with that option. But I'm not sure. Anyway, Now, I am installing de las beta of libreelec and I'll try everything.
[hr]
First of all, mi laptop's screen is broken. I can se nothing in that display. I have to use another display to use the laptop.
I have just installed the last beta of libreelec and, I enabled blank other displays and, video through DVI. In my 1080p display, it works well, i can see kodi and when I installed chromium, chromium appeared in my 1080p. I thought that it works in my 4k. But, when I connect my laptop to 4k Tv, there is no signal. I dont know why. With lubuntu everything works well, I dont know why in libreelec it doesnt work. Any idea?

Quote from Klojum

Keep your 4K tv connected, log in via SSH and give the URL from the following command. It should return a list of possible resolutions.

Code

xrandr | pastebinit

Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192
VGA-0 disconnected primary (normal left inverted right x axis y axis)
LVDS connected (normal left inverted right x axis y axis)
1280x800 60.00 +
1280x720 59.86
1152x768 59.78
1024x768 59.92
800x600 59.86
848x480 59.66
720x480 59.71
640x480 59.38
S-video disconnected (normal left inverted right x axis y axis)
DVI-0 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 1872mm x 1053mm
3840x2160 60.00*+ 30.00 25.00 24.00 29.97 23.98
4096x2160 24.00 23.98
1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1366x768 59.79
1280x800 59.91
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08

I need to do anything now?
[hr]
I used this command xrandr --auto --output DVI-0 --mode 1920x1080 and, kodi appeared in my TV, GOOD! but when i restart kodi, always the same, I have to do the same?

Quote from vitorp07

ssh and try this;

Code

echo "#!/bin/sh" > /storage/.config/autostart.sh


echo "xrandr --output LVDS --off && xrandr --output DVI-0 --mode 1920x1080 --rate 60.00" >> /storage/.config/autostart.sh

If you need to undo it, delete the entry in autostart.sh

Oh thank you very much, it works for me. Thank you for everything