What is the ambient air temperature the BBB is operating in? I would measure the temperature of the Sitara chip. Perhaps it is running on the high side. There is built in die temperature sensor, although I don't know how easy it is to read it.
Either, based on data, or as an experiment, put a heat sink on the Sitara and/or blow some air over the BBB --- Graham == On Monday, April 6, 2015 at 6:30:45 PM UTC-5, Andris Bjornson wrote: > > Hi all, > > I've deployed a number of Beagle Bone black units in West Africa as part > of an emergency connectivity relief effort to support NGOs working to fight > the Ebola outbreak. The beaglebones are providing a simple network > monitoring function. > > The beaglebones were imaged in November with the Ubuntu flasher downloaded > from here http://elinux.org/BeagleBoardUbuntu#Flasher (The version of > the image > is BBB-eMMC-flasher-ubuntu-14.04.1-console-armhf-2014-10-29-2gb.img) > > I'm having an issue with a few of the beaglebones hanging unpredictably, > and I know I should provide some more information to help diagnose...but > I'm having a hard time finding any "smoking gun" of what's causing the > hang. The beaglebones are in remote telco sheds monitoring network > equipment - so one of my challenges is that I don't have a monitor > connected or anyone I can ask "whats on the screen." Fortunately I do have > the ability to power cycle remotely (see below). > > Here's what I know: > > 1. The beaglebones have not been modified much at all from the > standard base flasher image. Just a few monitoring tools I've added from > apt packages (smokeping and zabbix-proxy) I use these tools elsewhere, > and > I've never had an issues with them hanging a system. > 2. The systems run for weeks at a time just fine > 3. At some point, the systems in question will "hang". They stop > responding to pings, but the ethernet port of the router they are > connected > to still shows a link light. > 4. Because I have the beaglebone connected to a > remote manageable power strip / PDU, I am able to power cycle the > beaglebone when this happens. This causes the unit to boot normally, and > it functions normally before the problem reoccurs another few weeks later. > > > > Each beaglebone is powered by a dedicated 5V / 1A power supply connected > to its barrel connector. Other equipment at the site does not hang or > reboot - so I know the beaglebone hang does not coincide with a power issue > at the site. > > Can anyone give me any tips on diagnosing this? I can see the time of > hang and powercycle in dmesg and syslog....but there's no hint there as to > what happened. Everything was "all conditions normal" before the hang. > > Has anyone seen this behavior before? > > Thanks so much - any help greatly appreciated! > > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
