Lei Wang, yes, You can just use a wire to connect SYS_5V and VDD_5V after boot up. We've done this before we choose the option with the transistor.
We are working on the 04.2013 U-boot, so we will try the newest version 10.2013 and I will let you know about my results. lisarden, According to you, the power management unit ( tps65217 ) in the BBB is not able to provide enough power by single pin? So why in the BBWhite or with the 3.8 kernel is no any random reboot? The PMIC is exactly the same... W dniu wtorek, 19 listopada 2013 20:05:34 UTC+1 użytkownik lisarden napisał: > > this issue can probably be because tps65217 simply can't handle too much > current through a single pin. If an internal switch AC|USB=SYS get > overheated then it can just shutdown to avoid a system damage > > > 2013/11/19 Lei Wang <[email protected] <javascript:>> > >> 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] <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > > > -- > LinkedIn - http://www.linkedin.com/in/maximpodbereznyy > Company - http://www.linkedin.com/company/mentorel > Facebook - https://www.facebook.com/mentorel.company > -- 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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