I am booting straight from eMMC that I flashed, no uSD and no serial 
interface. I have disabled cups and weewx from starting and removed the 
external USB HUB and changed the power supply to another 5v 2a. I can tell 
it has rebooted by looking at syslog for ntpdate 'step time server' events. 
My syslog resets daily at 6am, so looking at syslog1 it rebooted 10 times 
in last 24hrs. This is not a shutdown or reboot it is a system reset. Since 
I have removed all external attachments and USB is idle, I have to assume 
it's either a board hardware issue or the 3.16 kernel as reboot times are 
random and I don't have anything in cron.hourly. In 3.16 leds have been 
renamed to heartbeat, mmc0, usr2, usr3. I have heartbeat turned off. PSTREE 
not installed and apparently not a .deb dist either.

On Wednesday, September 3, 2014 3:41:54 AM UTC-4, Michaël Vaes wrote:
>
> When the SD card is inserted it automatically boots from there. Have a 
> look if there is a file called 'eMMC-flasher.txt' in the root of your SD 
> card it will start flashing on each reboot and reboots again. 
>
> If that doesn't solve it I would suggest overwrite the following commands 
> with a bash script that logs the output of a PSTREE to a logfile.   
>  - halt 
>  - shutdown 
>  - reboot 
>
> That will allow you to see what is triggering it. 
>
> Michaël

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