Which board revision Jonathon ? This board I noticed this on last night is an Element14 RevC. But on our A5A's I never noticed the USR LEDs cycling like that.
On Wed, Dec 2, 2015 at 4:59 PM, Jonathan Ross <[email protected]> wrote: > Got you on the script front. My issue is slightly different, when I get > into my magic state, pressing the power button does nothing. > > On Wednesday, December 2, 2015 at 3:51:42 PM UTC-8, William Hermans wrote: >> >> >>> *In my case linux is not booted at this time(none of the 4 user leds >>> lit), so a script would not help. This is why I'm doing an external >>> watchdog circuit.* >> >> >> Exactly. So here is what I mean. The USR LEDs cycle on for me *if* and >> only *if* I press the power button on the board. After that, nothing >> changes. Otherwise the LEDs are off, well the power LED is on, and the >> ethernet port lights are on too, and potentially blinking. >> >> The script, would just be to reboot the board in an attempt to put the >> board back into the bad state. For troubleshooting . . . >> >> On Wed, Dec 2, 2015 at 4:46 PM, Jonathan Ross <[email protected]> >> wrote: >> >>> In my case linux is not booted at this time(none of the 4 user leds >>> lit), so a script would not help. This is why I'm doing an external >>> watchdog circuit. >>> >>> On Wednesday, December 2, 2015 at 3:41:32 PM UTC-8, William Hermans >>> wrote: >>>> >>>> *I didn't test the 8 second holddown of the power button but I doubt it >>>>> would help, and unfortunately it's not a reproducible issue. I'll have to >>>>> wait for it to happen again.* >>>>> >>>> >>>> I know what you mean, e.g. this happens so erratically, it's hard to >>>> tell when it'll happen next. But, I could possibly whip up a script, and a >>>> means to automate resetting the system. Really, you could probably do the >>>> same as well. Just put "sudo reboot" in a bash script, and run it through >>>> rc.d >>>> >>>> With that said, I'm not 100% sure this is good for the board. >>>> >>>> >>>> >>>> On Wed, Dec 2, 2015 at 4:31 PM, Jonathan Ross <[email protected]> >>>> wrote: >>>> >>>>> I didn't test the 8 second holddown of the power button but I doubt it >>>>> would help, and unfortunately it's not a reproducible issue. I'll have to >>>>> wait for it to happen again. >>>>> From my notes, I was seeing zero volts on power, 5V on reset. >>>>> The zero volts on power was very weird. From the KL16 I'm "toggling" >>>>> my own effective power button that is a transistor between the power pin >>>>> on >>>>> the header and ground. The KL16 pin was not driven high (I checked), so I >>>>> don't think it was the transistor on the cape that was pulling pwr to >>>>> ground on the BBB. And the physical button wasn't pressed in. It was as if >>>>> the pullup at the PMIC wasn't active, yet the power LED was on. Is that >>>>> possible? >>>>> Wish I hadn't pulled the 5V power to reset, then I could do more >>>>> testing. >>>>> >>>>> On Wednesday, December 2, 2015 at 2:11:58 PM UTC-8, Gerald wrote: >>>>>> >>>>>> I would start with your cape design and try and rule that out first. >>>>>> >>>>>> The reset is an input pin read by the processor, not actually a HW >>>>>> power reset. If the SW is locked up, this could happen. >>>>>> >>>>>> If you hold the power button for a 8 seconds or more the board should >>>>>> power cycle. >>>>>> >>>>>> When it is in this state, what do the voltages read? >>>>>> >>>>>> Gerald >>>>>> >>>>>> >>>>>> On Wed, Dec 2, 2015 at 3:54 PM, Jonathan Ross <[email protected]> >>>>>> wrote: >>>>>> >>>>>>> Once in a blue moon one of my beaglebones will get into a state >>>>>>> where it has power (the power LED is lit), but it is not booted. >>>>>>> Normally >>>>>>> this would be fine, just hit the power button to reset. But in this >>>>>>> weird >>>>>>> state the power button does nothing. The reset button does nothing. >>>>>>> I checked the power and reset button pins on the header, the power >>>>>>> was low, the reset was high. >>>>>>> The only way to get the board out of this state was to pull the 5V >>>>>>> power. >>>>>>> I'm using a KL16 on a cape to do a watchdog on the BB, and reboot it >>>>>>> via power and/or reset buttons on the header if the BB stops sending >>>>>>> checkins over uart. This has been working great, except for the rare >>>>>>> case >>>>>>> where the board ends up in this state where the power and reset buttons >>>>>>> are >>>>>>> not functioning. >>>>>>> Any ideas how the BB could get into this state, and if there's any >>>>>>> other way to force a reboot other than physically pulling the 5v power? >>>>>>> Thanks, >>>>>>> JR >>>>>>> >>>>>>> -- >>>>>>> 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. >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Gerald >>>>>> >>>>>> [email protected] >>>>>> http://beagleboard.org/ >>>>>> >>>>> -- >>>>> 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. > -- 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.
