I have been trying to configure screen to power off each time I lock the session. I have tested two methods: built-in i3lock dpms capabilities and xset:
i3lock is supposed to turn off screen if invoked with -d switch, but it does not work. Screen goes black, but I can see backlight is powered.
"sleep 1 && xset dpms force off" causes the same behavior: screen goes black, but backlight does not turn off.
I have observed that leaving the laptop unused for some minutes also makes the screen go black but the backlight never powers off!
How can I make screen to completely power off?