Hi all, I have been having an issue where when heavily using a serial UART at high speed I would get a lot of overrun errors on the port and eventually the BBB would hang/appear to power off. It was very strange, we couldn't get kernel debugging at all, it did appear that is had powered down.
This morning I was making some changes to a device tree (attached) and managed to fix the problem, by disabling the wkup_m3 the problem appears to have disappeared. Usually it would happen after around 2-3 hours and so far have uptime of 12+ hours on 2 test units I have on the bench so it is looking good. Now....why is this the case. UART 2 is the one heavily used and the baud rate is 3Mbps and we are pretty much saturating the link at times. - What exactly does the wkup_m3 do? - Is it safe to keep it disabled? (Older device trees didn't seem to use it) - Where would this fault lie, hardware or software and who should I report it to? I've been pulling my hair out for a week and thankfully appear to have a solution!!! Happy Thanksgiving all. Lee -- 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.
testOverlay.dts
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