Mirror turning black after a while

cruunnerr

the wifi on the RPi 3 is not the best. So i installed an automatically wifi_rebooter here. U could try that as well: http://alexba.in/blog/2015/01/14/automatically-reconnecting-wifi-on-a-raspberrypi/

in my case my Pi pings my router address every 3 minutes and when it cannot reach it, it reboots it’s wifi itself.

For your other problem u could try “nmon”.

sudo apt-get install nmon

start it by simply typing nmon

when it starts u can type letters to choose what u want it to show. with “t, l, m, c” it will show u “top processes”, “long therm CPU usage”, “memory usage” and “actual CPU usage”

Mykle1

@cruunnerr

I agree. nmon is a very useful tool for diagnosing Pi cpu and memory issues.

https://forum.magicmirror.builders/topic/4684/electron-cpu-usage/11

retroflex

@Mykle1 @cruunnerr Thanks. Nmon is a great tip. I can clearly see that I have a CPU issue beside the memory leak. CPU for electron process is at 100% all the time. Currently at 30% mem, but I guess this will increase over time. Will check later.

PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
1146 pi        20   0  700648 300408  47112 R 100.0 31.6 215:22.52 electron

I’ve read the CPU usage thread and can conclude that I use electron v1.4.15 and MM v2.2.0. Mykle1, the thread said to use an older MM version, but I guess the new one should work ok too? Since electron was forced to the older version in the new release?

Now all I have to do is check each module I run and check CPU and mem for each :)

retroflex

My problem was MMM-ResRobot. I deactivated it and kept all other modules and now CPU is at 2% and memory stable over time at around 10%. Not sure if the MM/electron/ResRobot update caused the problem, but it worked ok before. Strange…

Mykle1

@retroflex said in Mirror turning black after a while:

and now CPU is at 2% and memory stable over time at around 10%

That’s great news, mate! I did that testing months ago to determine what was causing the CPU spikes. It was rather rewarding to have discovered the cause. They gave me an award. :-)

Peace!

schlachtkreuzer6

I got the same problem with an TV, around 6 to 9h it went black and I had to restart MM

cyberdie

Same problem here.
After some hours the creen goes black.
Pi Zero and “node serveronly”

retroflex

@cyberdie @schlachtkreuzer6 It seems to be related to a certain module. Most likely it is a memory leak you have too. Try to find out by disabling modules until it works.

It would be good to find the root cause to this though as many have problems. But that is a bit out of my expertise.

Binog

me too,… still while after while,… guess have that problem since version 2.0.0 but not sure,. cause update everything regularly,…

schlachtkreuzer6

@retroflex probably we need some code to clear the ram periodically. I think my problem module is the MMM-Globe. But I will have to test it. (about 10 modules… So one module per day… Uff that’s a looooong way.

cruunnerr

make two or three per day ;)

than it goes faster

retroflex

Maybe this can be the cause?

https://github.com/electron/electron/issues/11739

schlachtkreuzer6

@cruunnerr
I’m working 🙄 didn’t test anything yet 😅

FredJ

@retroflex I also got the same issue. MMM-resrobot or something it depends on looks to be causing this. Has anyone found a workaround? Resrobot is one of the main reasons I have the mirror so not really happy about disableing it.

retroflex

@Alvinger Do you know what could be the problem with ResRobot here?

Alvinger

@retroflex I can’t think of anythong off hand.

I am running an older version of MM myself so haven’t researched the electron issues.
Can anyone confirm that the issue started with the new MM version?

As I am running my magic mirror on an original Pi 1 with 256MB RAM with no issues whatsoever I am a bit surprised that the module should cause this.

Edit: MMM-ResRobot has but one dependency and that is the unirest module.

Which version of ResRobot are you running? I did a rewrite to reduce the number of updates w while ago.

cyberdie

@alvinger In my case, the problem started after last MM update.

retroflex

@cyberdie said in Mirror turning black after a while:

@alvinger In my case, the problem started after last MM update.

Same here. Running the latest ResRobot.

But I think others have reported the same problem but with a different module.

Alvinger

@binog @FredJ @cyberdie @schlachtkreuzer6

Looking through the unirest dependencies it looks like it relies on express which may or may not make it sus eptible to the issues with electron.

To resolve this I replaced unirest with node-fetch and pushed the new version of MMM-ResRobot to github.

To upgrade cd to your MagicMirror directory and run the following commands:

git pull
npm remove unirest
npm install

Please post results in this thread!
Hope this resolves the issue.

retroflex

@Alvinger Thanks for the quick fix! :)

My first test…

“top” without ResRobot shows about 1% CPU when idle.
Added ResRobot (old version): “top” shows 100% CPU all the time.
Updated ResRobot, removed unirest, npm install: “top” now shows 1% CPU when idle. Yay!

Looks good so far. Too early to tell anything about memory leaks, but I will keep my mirror running and check tonight. Currently electron shows 18% mem used (for the 2 electron processes).