> > *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.
