Kernel version 4.1.13-ti-r33 BBB V A5A After logging in, BBB 5V current is ~375mA
echo -n “mem” > /sys/power/state BBB 5V current is 56mA USR LED’s are all off PWR LED on Power Button press has no effect (1 second) Reset Button press has no effect *************************************************** Power Cycle BBB After logging in, BBB 5V current is ~375mA echo -n “mem” > /sys/power/state BBB 5V current is 56mA USR LED’s are all off PWR LED on Press Space Bar BBB 5V current is 131mA Power Button press has no effect (1 second) Reset Button press reboots BBB Regards, John > On Dec 2, 2015, at 7:19 PM, evilwulfie <[email protected]> wrote: > > > You can measure power all you want but if there is no way to reset the > processor what good is the device in a remote location. I have had things on > a remote mountain top at a transmitter site in winter that if things were > unresponsive > would ruin 2 or 3 days trying to get there to reset the device on a > snowmobile. > > Fail-safe computers are desirable. Hangs with no way to reboot a system are > not. > > On 12/2/2015 7:58 PM, John Syne wrote: >> We can speculate all day long, but measuring the 5V current consumption will >> tell us a lot more about the power mode state than anything else. >> >> Regards, >> John >> >> >> >> >>> On Dec 2, 2015, at 3:19 PM, William Hermans <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> If the software is locked up, the USR LEDs would not cycle as if the system >>> is attempting to restart. >>> >>> On Wed, Dec 2, 2015 at 4:08 PM, John Syne < >>> <mailto:[email protected]>[email protected] <mailto:[email protected]>> >>> wrote: >>> From what Gerald said previously in this thread: >>> >>> "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.” >>> >>> Regards, >>> John >>> >>> >>> >>> >>>> On Dec 2, 2015, at 2:55 PM, William Hermans < >>>> <mailto:[email protected]>[email protected] <mailto:[email protected]>> >>>> wrote: >>>> >>>> If the board was in sleep, then why wont the reset button reset ? Passed >>>> that, why would the USR cycle( flash on then off ) then nothing ? >>>> >>>> On Wed, Dec 2, 2015 at 3:47 PM, John Syne < >>>> <mailto:[email protected]>[email protected] <mailto:[email protected]>> >>>> wrote: >>>> Sounds to me that like BBB has gone into sleep mode and there is no >>>> trigger to wake it up. Is there a way to measure the current consumption? >>>> >>>> Regards, >>>> John >>>> >>>> >>>> >>>> >>>>> On Dec 2, 2015, at 2:40 PM, William Hermans < >>>>> <mailto:[email protected]>[email protected] <mailto:[email protected]>> >>>>> wrote: >>>>> >>>>> One more thing of note. I do not run systemd - Ever. I run SYSV as an >>>>> init daemon. I only mention this as I think Robert said something about >>>>> systemd lessening this issue. >>>>> >>>>> On Wed, Dec 2, 2015 at 3:36 PM, Gerald Coley < >>>>> <mailto:[email protected]>[email protected] >>>>> <mailto:[email protected]>> wrote: >>>>> Hmm, not sure what is going on. Sounds like the processor has stopped >>>>> running the code and halted but it forgot to turn off the lights. >>>>> >>>>> Gerald >>>>> >>>>> On Wed, Dec 2, 2015 at 4:26 PM, William Hermans < >>>>> <mailto:[email protected]>[email protected] <mailto:[email protected]>> >>>>> wrote: >>>>> Gerald, it's like the board hangs at power down, but I can not be 100% >>>>> sure. The reason why I "assume" it's at power down, is that the heartbeat >>>>> blink stops, but the rest of the LEDs stay on, and the ethernet port >>>>> light still blinks. >>>>> >>>>> The board I experienced this on last night is an Element14 RevC, but I do >>>>> also have a circuitco A5A that exhibits the same thing. >>>>> >>>>> On Wed, Dec 2, 2015 at 3:22 PM, Gerald Coley < >>>>> <mailto:[email protected]>[email protected] >>>>> <mailto:[email protected]>> wrote: >>>>> Is this on power up or is this state happening some time later? If it is >>>>> on power up, then the power supply most likely is the issue based on the >>>>> ramp requirements of the PMIC. >>>>> >>>>> If the power LED is on, then the PMIC is on and ramped up. That is why I >>>>> asked for the voltages. >>>>> >>>>> It also could be a boot pin read issue where it misreads the boot pins. >>>>> If that is the case you should see that from the serial port. >>>>> >>>>> Gerald >>>>> >>>>> >>>>> On Wed, Dec 2, 2015 at 4:15 PM, William Hermans < >>>>> <mailto:[email protected]>[email protected] <mailto:[email protected]>> >>>>> wrote: >>>>> For what it's worth Gerald, this happens with nothing connected to the >>>>> board as well. This just happened to me last night after issuing a reboot >>>>> command from the command line. >>>>> >>>>> I remember at some point you all were talking about something about the >>>>> "ramp time" of the PMIC or something. >>>>> >>>>> On Wed, Dec 2, 2015 at 3:11 PM, Gerald Coley < >>>>> <mailto:[email protected]>[email protected] >>>>> <mailto:[email protected]>> 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 < >>>>> <mailto:[email protected]>[email protected] >>>>> <mailto:[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 > <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] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout > <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. 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