Linux froze and got back working 5 days later, no reboot.
Hello my friends,
I've come across the weirdest of glitches.
I'm running a simple weather monitor (just temperature) on a Raspbeery Pi 3B (Raspbian Linux 4.14.98-v7+). It has a 3G modem that sends out simple packets to my server at home.
On june 5th I lost remote access to the device. Since it is located somewhere difficult to physically access, I couldn't manually reboot it.
To my surprise, on June 10th it got back to life. It has not registered a reboot! Here's the weird excerpt from the log at /var/log/messages:
Code:
Jun 5 17:54:28 raspberrypi NetworkManager[345]: <info> [1559768068.0169] policy: set 'VIVO ZAP' (wwan0) as default for IPv4 routing and DNS
Jun 5 17:54:28 raspberrypi NetworkManager[345]: <info> [1559768068.0174] dns-mgr: Writing DNS information to /sbin/resolvconf
Jun 5 17:54:28 raspberrypi NetworkManager[345]: <info> [1559768068.1295] device (ttyUSB2): Activation: successful, device activated.
Jun 10 23:14:33 raspberrypi NetworkManager[345]: <info> [1560219273.9397] (mon0): using nl80211 for WiFi device control
Jun 10 23:14:33 raspberrypi NetworkManager[345]: <info> [1560219273.9622] devices added (path: /sys/devices/platform/soc/3f300000.mmc/mmc_host/mmc1/mmc1:0001/mmc1:0001:1/net/mon0, iface: mon0)
Jun 10 23:14:33 raspberrypi NetworkManager[345]: <info> [1560219273.9623] device added (path: /sys/devices/platform/soc/3f300000.mmc/mmc_host/mmc1/mmc1:0001/mmc1:0001:1/net/mon0, iface: mon0): no ifupdown configuration found.
It's as if the operating system froze for some reason and suddenly got back working 5 days later! Absolutely no reboot registered.
I have absolutely no other log.
Does anyone know what could have happened there?
Last edited by jim mcnamara; 07-03-2019 at 11:23 PM..
In other Solaris 10 boxes I had similar problems when a device went wrong. Once it was a connector, another time it was a NIC (network card).
Syslog had no obvious entries about hanging up or any kind of disconnect. We were worried because the boxes in question were in the DMZ.
I have no real, proper method for diagnosing this. Someone else here may.
The best I can offer: Consider replacing the modem. What is the power source for the Pi card? the modem? Are the power connections meant for exterior deployment?
This User Gave Thanks to jim mcnamara For This Post:
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