I think Robert is correct. I fetched a snapshot of u-boot (2013.10), build and dropped it in. It seems that the time jump problem is going away.
I also did some testing with TI's kernel. I disabled the OPPs at 1G, 720M, and 600MHz. So the highest OPP is 500MHz. It seems that BBB is running much more robust. I ran the system overnight without seeing random reboots. I wonder if someone has some insight into this random reboot problem. Why it seems a slower clock helps? Why a USB connection also seems help (it doesn't seem to decrease the BogoMIPs)? What is the main difference between 3.8 kernel and 3.2 kernel? Thanks! On Tuesday, November 12, 2013 9:45:37 AM UTC-5, RobertCNelson wrote: > > On Tue, Nov 12, 2013 at 8:37 AM, <lei...@gmail.com <javascript:>> wrote: > > 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. > > This time 'issue' was fixed in u-boot sometime last year, so I'm > guessing the TI image has an un-patched u-boot.. > > > > > 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 > > > > Regards, > > -- > Robert Nelson > http://www.rcn-ee.com/ > -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
