The time jumping issue seems to relate to u-boot per Robert Nelson's suggestion ( https://groups.google.com/forum/#!category-topic/beagleboard/beaglebone-black/xPxzYyNsA78). I dropped in a newer u-boot images. It seems to fix the problem.
For the random reboots, I limited the CPU clock frequency to 500MHz. It seems that the board is running more robust. So far I didn't see any random reboot. However I still don't understand why it seems that Angstrom or 3.8 Android images make the difference. Connect SYS_5V and VDD_5V? Since I noticed by connecting the board to a USB port (i.e. adb) seems to stop the random reboot, I wonder if it has something to do with VDD_5V and SYS_5V. I will do a little bit more digging into the schematic. For test purpose can I just use a wire to connect SYS_5V and VDD_5V after boot up? Thanks! Lei On Tuesday, November 19, 2013 6:38:49 AM UTC-5, Jakub Żymełka wrote: > > My BBB is A5C version. We've tested more than 10 pcs BBB and all of it has > the same problem... > One, but not very elegant solution is to after start the board, make a > jumper between pins SYS_5V and VDD_5V, in example with any mosfet > transistor. > With this jumper, on kernel 3.2 there was no reset from the time of three > weeks. > Anybody have any other solutons? Because this cannot be the final. > > Best regards! > I look forward for suggestions! > Jakub. > > > W dniu piątek, 8 listopada 2013 05:12:08 UTC+1 użytkownik Lei Wang napisał: >> >> I have the same problem with BBB running Android. I tested TI prebuilt >> Android JB4.2 image. We have two versions of BBBs (A5A and A5C). Both of >> them have the issue. >> >> I posted my question on Ti e2e website: >> http://e2e.ti.com/support/embedded/android/f/509/p/297726/1049885.aspx#1049885 >> >> However it seems that the problem goes away when I load Angstrom image >> (based on 3.8 kernel). Also if I use Andrew Henderson's Android image >> (also 3.8), the problem goes away. However we cannot use Andrew's image >> since there are a lot drivers are missing. >> >> I also have the time jump forward problem. The problem goes away when I >> switch to 3.8 kernel. >> >> Jakub, may I ask what version is your BBB? >> >> >> Lei >> >> >> >> On Wednesday, November 6, 2013 4:11:52 AM UTC-5, Jakub Żymełka wrote: >>> >>> There are no hints or any solutions...?? >>> Please help! >>> >>> W dniu środa, 23 października 2013 13:09:00 UTC+2 użytkownik Jakub >>> Żymełka napisał: >>>> >>>> Hello! >>>> I have a problem. It is based on an involuntary resetting of the >>>> BBBlack. >>>> This happens occasionally. About once a day. Totally when you least >>>> expect it. >>>> This happens more often on higher frequencies ( 800Mhz, 1Ghz). >>>> On the console at the time of reset, nothing extra is displayed. No >>>> error's about kernel panic, sync, segmentation fault or another. >>>> Just like the same as if I pressed the reset button located on the >>>> board - but I DIDN'T! >>>> I'm working on Koenkoi's linux-kernel >>>> ti33x-psp-3.2.28-r16c-gitr720e07b4c1f687b61b147b31c698cb6816d72f01 + a few >>>> changes to run on the BBB. >>>> >>>> https://github.com/koenkooi/linux/archive/linux-ti33x-psp-3.2.28-r16c+gitr720e07b4c1f687b61b147b31c698cb6816d72f01.zip >>>> Kernel is exactly the same as in the Angstrom release. >>>> I would add, that on the BBW nothing bad happens, everything is working >>>> properly. >>>> Anyone has already had a similar situation? >>>> If it is necessary I can send the kernel patch and configuration file. >>>> >>>> Best regards! >>>> I look forward for suggestions! >>>> Jakub. >>>> >>> -- 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.
