Thanks for your fast reply. I've seen it on two of our boards - out of about 15. Only one of them had a cape (the RTC cape). Any idea if that one causes the issue?
I admit that the boards are installed over in Africa where clean AC power sources are not common. We are putting a UPS on the system to clean up spikes and avoid brown outs. One question... Does powering down a unit via unplugging a supply from the AC (the wall) also constitute a "violent" interruption in power, or is it just unplugging the power connectors from the board? On Wednesday, September 24, 2014 1:33:52 PM UTC-7, Gerald wrote: > > It is still an issue. We have seen it on .003% of the boards shipped. The > issue can also be related to improper design of capes that violate the > power up sequence. It may be a while before that shows up as a failure. > > Gerald > > > On Wed, Sep 24, 2014 at 3:05 PM, <[email protected] <javascript:>> wrote: > >> Hello, >> >> I saw the following on the Beagle Bone wiki page... >> >> "Improper Power Down....All Revisions >> >> ... Based on the latest information we have gathered, this appears to be >> an instance where the PMIC does not power down the processor in the right >> order due to the violent removal of the power cables, either USB or DC. So, >> we are recommending that the power button be used to power off the board or >> by issuing the Halt command. After that you can remove the power cable. If >> everyone follows this process, we should see a decrease in these issues, >> but it will take a while for the results, either good or bad, to show up. >> This will also help prevent the contamination of the eMMC and the SD cards >> by allowing the kernel to shutdown properly before power is removed." >> >> >> I also saw in one post that Gerald noted this was thought to be an issue, >> but now has been dismissed. >> >> >> Can you confirm that this is still an issue or not. >> >> >> The reason that I ask is that we are having Beagle Bone Black failures in >> the field where they go dead and we are trying to nail down why. >> >> >> If this is still an issue would unplugging a power supply from the wall >> be considered "violent" removal of the power? >> >> >> Thanks, >> >> >> Jeremy >> >> -- >> 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] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- 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.
