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] > <javascript:>> 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] <javascript:>. >> 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.
