Hey guys! If anyone still experiences the unexpected reboot issue I've found another solution to avoid it: raise the pin 2 (unconnect it from a pcb pad) of TL5209 (soic-8 chip) and solder a wire between this pin and 5V supplied from a wall adapter. TL5209 feeds mostly the Ethernet PHY and sometimes the PHY consumes to much current that is not possible to pass through tps65127. I really don't have any theory about it but this solution proves 100% its viability. Applied to my board and it worked during 96 hours and I even heated it by a hair fan to 70 Celsius degrees and it worked just as expected. Of course this solution works only if you use 5VDC source, not USB power. Another pros is that you only need a wire and a soldering tool, while the solution with a MOSFET requires a lot more precise soldering and the MOSFET itself.
2013/11/22 Gerald Coley <[email protected]> > That is not what it was for. It was to prevent a premature loss of reset > during power up. > > Gerald > > > > On Fri, Nov 22, 2013 at 12:18 AM, rod calabio <[email protected]>wrote: > >> There was a note on Beaglebone Black that the newest version BBB >> version 6 has or'd the reset button and the power button to prevent a >> reset, now whether or not it is the same problem >> as posted originally, ho knows. But I had the same issue where I was >> ssh'd into the BBB for several hours and then it just stopped for no reason. >> >> >> On Thursday, November 21, 2013 6:56:09 AM UTC-8, lisarden wrote: >> >>> Hey guys! >>> >>> I'm pretty sure that this mail-list is also read by people who are >>> invloved into kernel development and they may be aware of why 3.8 does not >>> reboot and 3.2 (TI) reboots the BBB. Are they here and can surmise where >>> the issue is? >>> >>> >>> 2013/11/20 Maxim Podbereznyy <[email protected]> >>> >>>> Ldo3 and ldo4 are not used to power any of really current- hungry >>>> unit like the ddr3 or the cpu core. >>>> 20 нояб. 2013 г. 13:23 пользователь "Jakub Żymełka" < >>>> [email protected]> написал: >>>> >>>> On the TI product page >>>> http://www.ti.com/product/tps65217B#feature<http://www.google.com/url?q=http%3A%2F%2Fwww.ti.com%2Fproduct%2Ftps65217B%23feature&sa=D&sntz=1&usg=AFQjCNHLbRM9BBCxhK0SOnLAnQJojRBVHA> >>>> is >>>>> the information about current limit: >>>>> >>>>> "Two Independent Load Switches That Can Be Configured as LDOs >>>>> Configured as LDOs: >>>>> - LDO Output Voltage Range: 1.5 V – 3.3 V >>>>> - VIN Range: 2.7 V – 5.8 V >>>>> *- 200-mA Current Limit (TPS65217A, B)* >>>>> *- 400-mA Current Limit (TPS65217C, D)"* >>>>> >>>>> Or maybe i'm wrong? >>>>> >>>>> >>>>> W dniu środa, 20 listopada 2013 10:03:54 UTC+1 użytkownik lisarden >>>>> napisał: >>>>>> >>>>>> Can you prove it? You mean it can supply more current? :) >>>>>> > But tps65217C (in BBB) has a more power availability vs. tps65217B >>>>>> (in BBW). >>>>>> >>>>>> >>>>>> >>>>>> 2013/11/20 Jakub Żymełka <[email protected]> >>>>>> >>>>>>> Ok, I see. >>>>>>> But tps65217C (in BBB) has a more power availability vs. tps65217B >>>>>>> (in BBW). >>>>>>> Reducing the CPU speed is not the solution. For example I would like >>>>>>> to work with a clock speed of 1GHz. >>>>>>> >>>>>>> So, are You suggesting that the PMIC is incorrect? >>>>>>> Can anyone else give an opinion? Maybe the designers of the new BBB? >>>>>>> >>>>>>> Best regards, >>>>>>> Jakub. >>>>>>> >>>>>>> >>>>>>> W dniu środa, 20 listopada 2013 08:42:18 UTC+1 użytkownik lisarden >>>>>>> napisał: >>>>>>>> >>>>>>>> Jakub, answering to your question: >>>>>>>> tps65217b is not tps65217b (bbb) >>>>>>>> Bbw 600mhz vs bbb 1000mhz >>>>>>>> Ddr2 pwr consumption != ddr3 >>>>>>>> >>>>>>>> That is why when people reduce the cpu freq systems become stable, >>>>>>>> but I don't think it can help because I run my board in cpu ondemand >>>>>>>> governor and it still reboots. However when running ezsdk my system >>>>>>>> seems >>>>>>>> to be stable while on Ubuntu it reboots randomly >>>>>>>> 20 нояб. 2013 г. 10:53 пользователь "Jakub Żymełka" < >>>>>>>> [email protected]> написал: >>>>>>>> >>>>>>>> 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]> >>>>>>>>>> >>>>>>>>>>> The time jumping issue seems to relate to u-boot per Robert >>>>>>>>>>> Nelson's suggestion (https://groups.google.com/for >>>>>>>>>>> um/#!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/sup >>>>>>>>>>>>> port/embedded/android/f/509/p/297726/1049885.aspx#1049885<http://www.google.com/url?q=http%3A%2F%2Fe2e.ti.com%2Fsupport%2Fembedded%2Fandroid%2Ff%2F509%2Fp%2F297726%2F1049885.aspx%231049885&sa=D&sntz=1&usg=AFQjCNHi1SsOZgxRVM8W2MqzjKJrfNmu0A> >>>>>>>>>>>>> >>>>>>>>>>>>> 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<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fkoenkooi%2Flinux%2Farchive%2Flinux-ti33x-psp-3.2.28-r16c%2Bgitr720e07b4c1f687b61b147b31c698cb6816d72f01.zip&sa=D&sntz=1&usg=AFQjCNF7TTdwvsG9LEKU3mvETE6oHuItGw> >>>>>>>>>>>>>>> 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<http://www.google.com/url?q=http%3A%2F%2Fbeagleboard.org%2Fdiscuss&sa=D&sntz=1&usg=AFQjCNEpMSpbklk_hXqEMMJhBr1sf-iMfQ> >>>>>>>>>>> --- >>>>>>>>>>> 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 >>>>>>>>>>> . >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> LinkedIn - 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