How to completely turn off built-in display during inactivity

[Irony58]

I've got an HP All-In-One desktop PC and recently installed MATE 21.3. I'd like to turn off the monitor completely when inactive for some time. The Mint Power Management only blanks the screen, leaving the backlight on, so it still consumes power. Windows 10 power management turns the screen all the way off, so I know it's at least possible with the hardware.

We don't use this PC much at all, but I was looking to keep it turned on 24/7 to use it for network storage. I only switched this PC to Linux because, on the occasions when we do use it, the Windows performance is painfully slow. The extra energy usage with the display on is only about 12 Watts, but still - It's 12 Watts.

[Pjotr]

Please generate an overview of your system like this:
- Launch a terminal window (this is how to launch a terminal window);
- Make the terminal window full screen, to avoid chopped lines;
- Copy/paste this command into the terminal:

Code: Select all

inxi -Fxxxpmrz

(if you type: the letter F is a capital letter, and don't omit the space after inxi!)

Press Enter.

Copy/paste the output into your next message.