Electron screen becomes blank after a period of time

MMRIZE

Check whether some modules make unhandled exception error when it create DOM.

[CX3] Module is not prepared yet, wait a while.
getDom @ MMM-CalendarExt3Agenda.js:193

[CX3] Module is not prepared yet, wait a while.
getDom @ MMM-CalendarExt3.js:228

This message might imply some other module fails to create DOM at its start. (I’ll fix the CX3* modules not so strict to other module’s failure soon.)

By the way, It would be better;

Remove all modules from config
Then add one by one unless you meet the problem.

DDE12

@MMRIZE I updated MMCalendarExt3* and am not getting those messages. Thank you! I have done the troubleshooting you recommended and have discovered that it is MMM-Wallpaper when set to display NASA’s Astronomy Picture of the Day. The black screen does not occur when I set the wallpaper to Met Museum or Firetv. Should I start a new post on troubleshooting MMM-Wallpaper?

sdetweil

@DDE12 yes, start a new topic, but it’s probably a picture format or size problem

I don’t know if wallpaper has anyvdebugging/logging

karsten13

@sdetweil

I suspect it’s a problem of the pi, not enough memory …

miabaker

Hi, I have the same issue of electron screen becoming blank. I have tried some solutions but none worked. I have added a line of code in my main.js file that reloads the window every 10 minutes. This prevents the screen from going blank. Here is the code snippet:

// Create a new BrowserWindow instance
let win = new BrowserWindow(options);

// Load the index.html file
win.loadFile('index.html');

// Reload the window every 10 minutes
setInterval(() => {
  win.reload();
}, 600000);

I hope this helps you keep your magic mirror running.

Regards, Mia from CodeIT

sdetweil

@miabaker so, you should find the module that’s failing and fix that.

DDE12

@karsten13 You might have something there. I changed the source in MMM-Wallpaper from the HD NASA to regular NASA and it took several hours or more for it to go blank. I have had the same problem with other modules as well that seem to resolve when I make the update interval longer. I’ve stopped using the MMM-Wallpaper at this point but I’m hoping there is some further troubleshooting to identify if the Pi is the problem and explore for a solution.

BKeyport

@DDE12 I’d suspect both of those modules aren’t handling server difficulties well from NASA…

sdetweil

@BKeyport also, there have been image size issues as well. many of the NASA images are huge