This annoys me a lot, as whenever I lock the screen, my big screen turns off and it is an old slow screen that takes a few seconds to turn on again.
To disable this behavior, do the following:
- Download this extension: https://www.dropbox.com/s/5owr2bxhbijdino/no-screen-blank%40example.com.zip?dl=1
- Extract the file and edit the metadata.json file, adding “3.28” to the list of supported shell-version
- Place the folder inside ~/.local/share/gnome-shell/extensions/
- Open gnome-tweaks (install it first by apt install gnome-tweaks if you don’t have it already)
- Go to Extensions and turn “No screen blank” extension on.
- Enjoy!
Note: I have uploaded the modified version to support Gnome 3.28 here.
Tested on Ubuntu 18.04 with Gnome 3.28.
Thanks go to the anonymous developer here, who did quite a good job!
Just Some Techie Notes! 
Thank you! I’ve used Linux for many years and still I don’t understand why they made it so difficult for such an obvious option!
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You are welcome 😊
Kind Regards,
Ahmad Amr
On Thu, Aug 9, 2018, 9:55 AM My Technical Thoughts wrote:
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If someone don’t see the “no screen blank” just restart Gnome pressing the keys Alt + F2, type “r” (without quotes) and press Enter.
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thank you so much for this, this was the only site out of 20 which described the problem and solution of what i was looking for.
also thanks so much to augus1990 for that hint, i was stuck on that.
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Worked like a charm, you are the funcking one! Congratz!
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