How to hide desktop screen when raspberry turned on?

sdetweil

@bretonesf said in How to hide desktop screen when raspberry turned on?:

Now when the raspberry boots up, The screen remains fully black until MM starts and all the modules are loaded, except one white flashing screen at the startup of MM, I don’t know why.

its a bug in Electron browser, long talked about but not solved. MM sets its background to black before opening the page

bretonesf

@sdetweil good to know, thanks for the tip.

According to you, the 50s I’m talking about is ok or long?

bhepler

@bretonesf - That’s about right for a RPi 3B+.

bretonesf

@bhepler - Nice, thank you.

BKeyport

FWIW, there’s lots of modules available for turning off/blanking the screen when not needed - that way you can leave the pi running (at minimal power use) and just have the screen turn off and on with a sensor or button…

sdetweil

@BKeyport or webcam in my case

BKeyport

@sdetweil I’d put that under “sensor” – but how do you do that?

sdetweil

@BKeyport i didn’t want to program for every webcam out there, so I found a system level library that does it

the motion project… it can do all kinds of video/pics on motion…
https://github.com/Motion-Project/motion

but it also can call a script/program when motion starts/ends… so I wrote a MM screensaver module that watches for the events from the external motion module… now my TV’s don’t support any cool way to turn off the display, so I hide all the modules… and show later on motion…
https://github.com/sdetweil/MMM-SleepWake
(and I use this same approach on a different smart-mirror that I found before MM)…