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]<javascript:>> > 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/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/sup >>>>>> port/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. >>>> >>> >>> >>> >>> -- >>> 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. >> 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. >> > -- 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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