Mirror turning black after a while

[retroflex]

@bimalnair I haven’t done any more research. But now I have started in dev mode and will see if the console log says anything useful. But it usually takes some hours before my freezes, so I will know later today (hopefully).

Another test is to remove module by module to see if a certain module is causing problems. Or the opposite, start with only one module and see if it will freeze. Can you check which modules we share? Maybe we can narrow it down a bit.

[bimalnair]

I am using the following modules
default/alert
default/clock
default/calendar
default/currentweather
default/weatherforecast
default/newsfeed
default/compliments
MMM-ShipmentTracking
MMM-Traffic
MMM-ImagesPhotos
MMM-dht22

Will try disabling each module

[Chris]

Hello,
I think it would come from one of your modules because I do not encounter the problem since I put my mirror with my usual modules. if that helps you, it happened to me when I tried to install and set up the MMM-Assistant.
Regards,

[prysme01]

Hello, After upgrading MM to 2.2.0 and also upgrading my debian, I am also facing this issue of random black screen. PI is still up and I can log in and restart mm. Really annoying issue.

[retroflex]

@bimalnair Have you tried to find out which module is causing problems for you yet?

I have finally got a dev log file from the error… As it’s not timestamped, it’s hard to draw any conclusions. But this is one of the lasts logs, which presumably is when the mirror goes black:

[5966:0125/191204:FATAL:memory_linux.cc(35)] Out of memory.
#0 0x0000012a3bb0 
#1 0x0000012b4406 
#2 0x0000012c8ae6 
#3 0x000000d8bb1c 
#4 0x000000d8ba9e operator new()
#5 0x0000012b9ee0 
#6 0x0000012b94ce 
#7 0x0000012ba204 
#8 0x0000012cb2c6 
#9 0x0000012b89f6 
#10 0x000000b58d18 
#11 0x000000a34c38 
#12 0x000000a35a80 
#13 0x000000a349c2 
#14 0x00000221e2fa main
#15 0x000074c0f294 __libc_start_main

I did not check which process is eating all the memory though. That will be the next step.

Other than that I can see in the log that I lost internet connection a couple of times:

fatal: unable to access 'https://github.com/MichMich/MagicMirror.git/': Could not resolve host: github.com

Whoops! There was an uncaught exception...
TypeError: Cannot read property 'feed' of undefined
    at ClientRequest. (/home/pi/MagicMirror/modules/MMM-Skolmaten/node_helper.js:45:20)

And a lot of these logs, which I guess is ok:

Reusing 14 cached departure(s) for module: MMM-ResRobot

Any bright ideas? :)

[cruunnerr]

@retroflex

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!