Read the statement by Michael Teeuw here.
Stop the screensaver!
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Update.
Last 3-4 days my MM was running just fine without screensaver appears. Last night it happened again so I restart MM in dev mode to see if I find an error after the the screensaver’s black screen. When I moved the mouse (after some time the screensaver had appeared) the screen was white and in dev console I had a message saying websocket disconnected or something like that. Usually when I moved the mouse after the screensaver and without the dev tools enabled the black screen dissapears and I get my MM screen back. This time was different. I’ll try to upload a screenshot when I get home. -
usually when u see that the MM runtime has crashed for some reason… even the debug console is gone
I haven’t found a way to debug what has happened… I see this occasionally…
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This is getting too weird. Yesterday I had the MM running in dev mode and after I saw the screensaver I moved the mouse and everything came back as normal and no errors in the console. I don’t know why this happens not all the time and with different characteristics everytime.
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@Anthony when the screen went to sleep was the developer window hidden too?
when my MMM-SleepWake hides all the modules, the Developers console is still on the screen
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@sdetweil
In my case when the screen goes to sleep everything is hidden, modules, dev console etc. I see only black screen. Is there any possibility that pi “forgets” the setting to disable the screensaver? I will try to go and change this setting and after put it back again to see if anyhting changes. -
@Anthony interesting… neither of my systems has forgotten the screen saver setting, been running for over 2 years now…
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@sdetweil
I don’t think that this is the problem but I want to test it just in case. -
At this point, I’m thinking a
sudo apt-get update && sudo apt-get upgrademight be in order. There could be a bug in the Pi’s power management routines. -
@bhepler
I will try this as well but 3 days now the problem does not appear. I haven’t touch anything on my MM and I don’t see the black screen. I will try asudo apt-get update && sudo apt-get upgradealthough. It is always usefull. Thank you. -
This is a screenshot of what happened after about half an hour after restarting magic mirror.

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This post is deleted! -
@Anthony - That looks like a network outage. The errors show that the NASA module or whatever can’t pull images from the API. And then you lost connection to your mirror.
Of course, it could be the Pi shutting off to disconnect the developer tools. Hrm.
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