> > > > *William/Wulfman: So far, running on USB Power module (no USB > communications) the BBB is staying up. It has been 18 hours or so now. > Running the same software that rebooted twice in 24 hours on +5V barrel > connector input. I have seen the 'bad' configuration run as long as 36 > hours between reboots, so the test needs to continue for at least two days.* > > > *Thanks to Maxim for the explanation. If that is the problem, it looks > like the problem existed in 2013, a software patch was applied, and the > software patch was lost between kernel 3 and kernel 4.* > *--- Graham*
Glad to hear that so far everything seems good Graham. So far. However I have a sneaking suspicion it will continue to run until you decide to shut it off. Not 100% sure though, hence the need for someone like you to test. In hopes of narrowing down this problem. On Mon, Jul 20, 2015 at 9:10 AM, evilwulfie <[email protected]> wrote: > usb0_vbus on the processor is an analog input to a comparator. > page 80 of the processor ref manual says - USB0_VBUS (7) Supply voltage > for USB VBUS comparator input > i do not see it saying supplies any voltage to the circuit anywhere in the > PDF. > I can see the software causing the issue if there is some kind of noise in > the line. > maybe instead of a hard ground which would cause headaches if one was to > plug a usb power connector to the BBB > a pulldown of 10k on the line to keep it low. > One would need to test this idea out. > > Gerald might have a comment ? > > > > On 7/20/2015 12:41 AM, Maxim Podbereznyy wrote: > > As far as I remember how the Vbus issue was described in details, hope I'm > not mistaken: > Vbus connects to both CPU and PMIC. CPU has a charge-pump circuit to > detect OTG devices (inject some power and track USB signals for incoming > events) and it injects 5V periodically into Vbus line. Sometimes PMIC > detects this 5V on the Vbus input as a good voltage and turns inner power > switch to Vbus where in fact no 5V with sufficient current. Next power > failure and immediate reboot occur > > 2015-07-20 3:08 GMT+03:00 john dough <[email protected]>: > >> >> >> Sent from my Windows Phone >> ------------------------------ >> From: William Hermans <[email protected]> >> Sent: 7/19/2015 11:11 AM >> To: [email protected] >> Subject: Re: [beagleboard] BBB intermittently rebooting. >> >> Graham, thats where you're wrong. I've been using all those testing >> kernels EXACT SAME KERNELS you've been having troubles with. Except, I'm >> not having troubles with them. Why ? Becasue I'm powering via USB. >> >> So if you REALLY want to prove the problem this won't work for *you* try >> powering via USB . . . >> >> On Sun, Jul 19, 2015 at 7:55 AM, Graham <[email protected]> wrote: >> >> Eric: >> You never said what you were trying to do with the BBB, and why you need >> Debian 8.1/kernel 4.x.x. >> As you have seen, it is temporarily broken, but is being worked on. This >> is a "test" release, and not recommended for active use, unless you like >> adventures, like you are having. >> >> If you need the capemanager, consider Debian 7.8/kernel 3.8 >> >> If you don't need the capemanager, but need some other benefit of Debian >> 8, then use Debian 8.x and kernel 3.14. >> >> Both of these options are solid, do not reboot by themselves, and don't >> care whether it is powered from the 5V barrel connector or USB. >> --- 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 [email protected]. >> 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. >> -- >> 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. >> > > > > -- > LinkedIn - http://www.linkedin.com/in/maximpodbereznyy > Company - http://www.linkedin.com/company/mentorel > Facebook - https://www.facebook.com/mentorel.company > -- > 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. > > > -- > 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. > -- 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.
