I Powered one from a USB power supply only with no random reboots
On 7/19/2015 9:45 AM, Graham Haddock wrote: > Yes, I will go run the USB-Power test. > > I guess my question is... are you are powering your BBB from the USB > port on a computer, or, are you powering your BBB via the USB port > from something like a power supply or cellphone charger, which does > not have a computer and USB driver in it. > > If you are powering the BBB from a computer, and that computer has the > BBB driver on it, that allows you to see the BBB's internal web site, > etc, then, even though you are not using it, when you plug it in, the > driver comes up and starts polling the BBB at 1000 times per second, > to see what is going on. A lot is happening at the lower levels of USB > that take time to service on the BBB. > > --- Graham > > == > > On Sun, Jul 19, 2015 at 11:14 AM, William Hermans <[email protected] > <mailto:[email protected]>> wrote: > > /Or, are you just powering it via the USB connector and not > using/engaging the USB subsystem in the BBB?/ > > > Not sure if g_multi or g_ether is setup on this image. In either > case, I'm only using ethernet. I'll look though. *looks* > > /Looks like the answer is "no"./ > > /debian@beaglebone:~$ lsmod/ > /Module Size Used by/ > /snd_soc_evm 5854 0/ > /omap_rng 5140 0/ > /rng_core 8755 1 omap_rng/ > /snd_soc_davinci_mcasp 18528 2/ > /snd_soc_edma 1166 1 snd_soc_davinci_mcasp/ > /snd_soc_hdmi_codec 2514 1/ > /uio_pdrv_genirq 3657 0/ > /uio 9930 1 uio_pdrv_genirq/ > > > Anyway, I can understand that you may not want to use USB to power > the device. However as a test to see if vbus / vusb is floating . > . . this can not really hurt to power via USB for a little while > during tests. > > Once it is established that this problem is related or not, then > you and others can act accordingly. Grounding the necessary lines, > or not. > > This really makes sense to me though, at least from my own > perspective. Since I'm not having the problems you all are having > with the same kernels. Passed that, if it does not pan out. Well, > a little wasted time, but well worth the effort considering this > problem seems to plague several people. Easy enough to test anyway > . . . > > On Sun, Jul 19, 2015 at 9:00 AM, Graham Haddock > <[email protected] <mailto:[email protected]>> wrote: > > My advice to Erik is that, if he has something important to > do, to go back to an official release. He should use a "Beta" > release only if he can afford the additional problems it might > bring, and in this case there are some. In my application for > the BBB, I do not use or want to use the USB connector. The > previous kernels worked fine with the +5V power. Although the > +5V versus USB power behavior could be an important clue to > what the problem is. > > == > > When you say "powered by USB" are you also running the USB > g_multi interface to a PC and engaging the driver in the PC? > > Or, are you just powering it via the USB connector and not > using/engaging the USB subsystem in the BBB? > > I think there are (at least) two variables here. > > I will go power my BBB via the USB connector, which will power > the Vusb line, but without any USB activity on the USB > connector and see what happens. > > I agree that systemd is not the likely problem, since kernel > 3.14 uses systemd, and works fine, USB or +5V connector. > > My personal observation is that the less the BBB is doing, the > more likely the self-reboot is to happen. > If I turn off the four blinking blue LEDs, with the BBB not > doing anything else, the reboots seem to happen more often. > So, if you are powering the USB connector from a computer, it > may be the USB activity, not the power source that is changing > the behavior. > > --- Graham > > == > > > > On Sun, Jul 19, 2015 at 10:11 AM, William Hermans > <[email protected] <mailto:[email protected]>> wrote: > > Graham, thats where you're wrong. I've been using all > those testing kernels EXACT SAME KERNELS you've been > having troubles with. Except, I'm not having troubles with > them. Why ? Becasue I'm powering via USB. > > So if you REALLY want to prove the problem this won't work > for *you* try powering via USB . . . > > On Sun, Jul 19, 2015 at 7:55 AM, Graham > <[email protected] <mailto:[email protected]>> wrote: > > Eric: > You never said what you were trying to do with the > BBB, and why you need Debian 8.1/kernel 4.x.x. > As you have seen, it is temporarily broken, but is > being worked on. This is a "test" release, and not > recommended for active use, unless you like > adventures, like you are having. > > If you need the capemanager, consider Debian > 7.8/kernel 3.8 > > If you don't need the capemanager, but need some other > benefit of Debian 8, then use Debian 8.x and kernel 3.14. > > Both of these options are solid, do not reboot by > themselves, and don't care whether it is powered from > the 5V barrel connector or USB. > --- Graham > > == > -- > 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] > <mailto:[email protected]>. > For more options, visit > https://groups.google.com/d/optout. > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a > topic in the Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > > https://groups.google.com/d/topic/beagleboard/2yOpE3XYJ1Y/unsubscribe. > To unsubscribe from this group and all its topics, send an > email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. > > > -- > 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] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in > the Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/2yOpE3XYJ1Y/unsubscribe. > To unsubscribe from this group and all its topics, send an email > to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. > > > -- > 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] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. -- 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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