Robert: I know you are not looking for a hardware modification as a solution, but if hardware modifications would help diagnose and debug the problem, I have the capability to do "blue wires" or change parts, for about anything other than a BGA.
The trick is to get the BBB to tell you what is triggering the reboot. The USB power feed does not do it, the +5 V barrel power input does. Kernel 3.xx does not do it, kernel 4.x.x does. I suspect some code changes from the USB main line code has changed the way the power source/direction sniffing works. For instance, the USB connectors on tablets, which is probably inside kernel 4, can accept power for charging tablet batteries, or supply power for running thumb-drives or other USB accessories. How they do this would change code in this exact area. If the PMIC is allowed to autonomously make power source switch-overs, without permission from the Sitara, and it is making bad decisions, as others have suggested, then I am not sure how to approach it. --- Graham == -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
