It seems that Angstrom 3.8 kernel is more robust. But I couldn't confirm that it will resolve the random reboot issue. I haven't done long term testing. I remember seeing someone also has problem with it. It could be just that kernel is more optimized which draws less current.
Limiting the CPU frequency only made BBB random reboot less often. I can confirm that. I believe it is also related to the current draw. The slower the clock the less the power is drawn from PMIC. By plugging in both DC power and USB cable (mini connector), it increases the PMIC current capacity. PMIC has two power paths (AC->SYS and USB->SYS), which reduces the stress placed on a single path (AC->SYS). I am suspecting the PMIC thermal shutdown causes the random reboot. Please take a look at the other thread I mentioned in a previous post. Jakub suggested putting in a Mosfet to bypass VDD_5V to SYS_5V path after boot up. BTW, could you tell me what is your setup besides using TI prebuild kernel? Are you driving a HDMI display or a LCD cape? what else do you connect to the BBB? Thanks, Lei On Wednesday, November 20, 2013 12:28:36 PM UTC-5, [email protected] wrote: > > I confirm that I have the same issue with a BBB A5B using TI 3.2 kernel. > > After reading the full thread I guess that the posible workarounds are: > > - Using Angstrom 3.8 kernel. > - Powering the BBB from USB. > - Limiting the CPU frequency. > > Can anybody confirm it? > > Best regards. > > > El martes, 12 de noviembre de 2013 15:37:07 UTC+1, Lei Wang escribió: >> >> I have similar issue. I have (2) versions of BBB (A5A and A5C). They both >> randomly reboot themselves while I am running TI prebuilt BBB android image >> (from a couple hours to ten to fifteen hours). When I plug in the USB (DC >> is still powered) for logging with logcat, the reboot issue seems to >> disappear. >> >> I don't have problem with BBB Angstrom image (based on 3.8 kernel). I >> don't have problem with Andrew Henderson's android image (based on 3.8 >> kernel) either. >> >> Another issue is that when I run TI BBB android image, the clock randomly >> jumps forward 2^17 seconds. This happens on both of my BBB boards. The >> problem goes away when I run Angstrom or Andrew's android. >> >> I suspect it has something to do with the processor, DDR3 (BBB: AM3359 >> 1GHz + 512MB DDR3), the configuration, or apply workaround of errata. We >> have an AM335x EVM kit (AM3359 720MHz + 256MB DDR2). I also loaded TI >> prebuilt android image. I have run it for several months. It is rock solid. >> I never had problem with it. >> >> Here are the links to my other posts in regarding to this issue. >> >> https://groups.google.com/forum/#!category-topic/beagleboard/advanced/5qSJ4dQdar4 >> http://e2e.ti.com/support/embedded/android/f/509/t/297726.aspx >> >> >> >> On Thursday, October 31, 2013 6:32:16 PM UTC-4, Illutian Kade wrote: >>> >>> And now the board won't power on from the Debug Port, but will form the >>> DC jack. At this point I'm about to say "fuck this shit". >>> >>> On Saturday, October 5, 2013 7:12:06 AM UTC-4, Illutian Kade wrote: >>>> >>>> Has anyone experienced their BBB rebooting at random? >>>> >>>> It was running solid for two days straight and this morning it just >>>> keeps rebooting. This last time the power light even went out. >>>> >>>> *I've checked and all cables are secured. The entire setup is running >>>> of a PFC UPS; so power fluctuations shouldn't be an issue. >>>> >>>> *CPU doesn't seem to be under load; ~20% utilization >>>> >>>> *I've done a total unplug-let-sit and restart >>>> >>>> *From what logs I've looked through (message and kern.log) the board >>>> does a total restart and loses even the date (goes form Oct 5 to Aug 26) >>>> >>>> *I've not made any changes other than unplugging the Syba C-media USB >>>> sound card and transferring it back to my main computer after I wake up >>>> (BBB is doubling as a media player) >>>> -This has worked for a grand total of 'uptime' 2 days and some odd >>>> hours with no issues. >>>> >>>> ..I really hope this doesn't mean the board is defective :\ >>>> >>>> OS: Debian Wheezy (BBB-eMMC-flasher-debian-7.1-2013-08-26.img) >>>> Power: AC Adapter (http://www.adafruit.com/products/276) [specifically >>>> recommended by Adafruit] >>>> >>> -- 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/groups/opt_out.
