Prevent screensaver depending on activity

Question

I have an .NET Core app displaying data using a raspberry PI (Raspberry PI OS/Raspbian). I'd like to prevent raspberry's screensaver (or sleep mode) only when there's something to display. Which command can I send ? What mecanism can I use ?

Answer 1

I found how to do so :

• First, I permanently deactivate screen-saver with autostart script and commands :

  @xset s off

  @xset -dpms

• Next, I only "play" with hdmi activation when I need it:

  - `tvservice -p` to activate HDMI display
  - `tvservice -o` to deactivate HDMI display
  

To send command, I use this :

Process.Start(new ProcessStartInfo { FileName = "/usr/bin/bash", Arguments = "-c \" COMMAND_TO_SEND \""}).WaitForExit();