shutdown and startup by comamnd or other way but no GUI

[Nutul]

ok. Thanks for fast reply.
I just trying to sinf a way do power off my 7inch screen when not using moode. i have a 7ich touchscreen and when i set hdmi_blanking=1 it goes off, yes, but a few seconds screen go to blue and "no signal" info. it's so annoying.
So maybe you can find other solution to do that?
ulitmately i use smart swith to control.
I try with ./hub-ctrl and uhubctl but it doesnt power off -5v to screen.

I have the original Raspberry 7'' touch display, and I set moOde to switch the display off after 5 minutes of no activity; and it works perfectly.
It also turns the display back on if I put it on play from my phone or laptop... I see no problem.

What is your display? How is it/can it be connected?