Electron screen becomes blank after a period of time

sdetweil

@DDE12 those are warnings we can’t suppress… nothing we can do… problem is not in MM code…

when the mm screen goes black again , open the developers window

ctrl-shift-i on the MM screen keyboard
then select the console tab, and scroll up to any errors (usually red text )

cannot do this remotely has to be on the screen where the problem occurred

DDE12

@sdetweil These are the only messages and probably not actually a problem:

Your are using the deprecated config values ‘colored’. Please switch to ‘coloredSymbol’ & ‘coloredText’!
start @ calendar.js:100

[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

If electron stops with Dev window closed, I cannot open it. If electron stops with Dev window open, there is a message “DevTools was disconnected from the page…”
If this is not a clue to aid in the troubleshooting, please let me know what to try next to get you some more info. Thanks!

sdetweil

@DDE12 yes, if the right code crashes, then dev window will die

sometime npm start dev will allow you to see the error before it dies…

MMRIZE

@DDE12

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.