I'll try again. The PocketBeagle, when powered only by the Vin input (P1-pin1) is unstable. This is the power supply input, normally assigned to the barrel jack in the BBB, or the AC adapter input in the TI docs.
Not to be confused with the Vi input (P1-pin7) which is connected to Vusb0 and Vusb1 on the PocketBeagle. I have found that when running with Vin and Vi inputs strapped together, the problem does not occur. I will try a run with the power on Vi only and see what happens. During both test runs, there was a USB2-to-Ethernet adapter on USB1, but to make sure that the Ethernet driver is not the problem, I have run a PocketBeagle, powered from Vin with nothing else connected than a serial cable on UART0 console, and the unit still behaves the same. My opinion is that it is either a hardware or configuration problem with the PMIC. ================================================================ Stability Test Run - DEC 02 Both PocketBeagles are powered from the same lab-bench supply, via Vin. Good regulation at 5.00 Volts and plenty of current available from the lab-bench supply. ======= Time is UTC, defined as the time that systemd-timesyncd resyncs during the reboot. ---- PocketBeagle-2 Linux beaglebone 4.9.61-ti-r76 #1 SMP PREEMPT Mon Nov 13 20:24:26 UTC 2017 armv7l GNU/Linux Start of test/manual reboot at Dec 2 21:52:18 UTC Autonomous reboots Dec 3 04:42:20 Dec 3 04:53:18 Dec 3 06:01:06 Dec 3 06:03:45 Dec 3 12:18:47 Dec 3 12:30:04 End of test: Sun Dec 3 13:47:05 UTC 2017 ================================================================ PocketBeagle-1 Linux PB1 4.4.91-ti-r133 #1 SMP Tue Oct 10 05:18:08 UTC 2017 armv7l GNU/Linux Start of test/manual reboot at Dec 2 21:52:37 UTC Autonomous reboots at Dec 3 02:24:55 UTC End of Test: System had crashed, no lights, No Ethernet connectivity, had to reboot to recover syslogs Dec 3 13:50:34 ================================================================ -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/c7c27fa0-917e-4e96-a2f3-19feb5f65ef3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
