Sounds like you have it fairly well isolated, down to a specific PC. So not exactly BBB related but . . .
How old is this PC in question ? I've read about PCs with garbage power regulation ( on the motherboard obviously ) exhibiting flaky behavior as such. Another "idea" that comes to mind is that the driver software could be in a bad state for some reason. Bad install, hardware drivers that do not play nicely with libusb, or even potentially . . . a virus. It could even be an old Windows install going crazy ( assuming windows of course ). There is a tool which for the life of me I can not remember the name of that can monitor the USB protocol while connected. Wireshark can do this too I think. So this may be one way to troubleshoot software issues. As for hardware issues, I'm not sure exactly how to go about troubleshooting. . . On Fri, Mar 20, 2015 at 1:57 AM, <[email protected]> wrote: > Hi, > > I have been working on the beaglebone since 1 year now and I had no issue > since some days ago. > I am using the BBB with a motherboard which among other thing is powering > the BBB . > The issue happens when I am first plugging the mini USB to a PC then plug > the power from the motherboard. The symptoms are that the i2c busses 1 and > 2 are timeouting when I am doing i2c request.Bus 0 is fine. > If I do a i2cdetect -y -r 1 it takes about 2 secs poling each adress . The > other symptom is that sometimes I loose ethernet over usb connection . > I tried several BBB (rev B and C) with several motherboards and issue is > still there. > The other strange thing is that for now It happens only on 1 PC. Here > again I tried different USB port with same behavior. > I have read lots of messages from this group without finding anything > close to my issue. The only similar issue I have found is here : > http://stackoverflow.com/questions/29140579/beaglebone-black-stops-when-external-powered > I tried the latest release debian 2015-03-01 and althought it seemed more > stable than mine which is from april 2014 I am still experiencing the issue. > So any idea or similar experience is welcomed ! > Thanks, > > RW > > -- > 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/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]. For more options, visit https://groups.google.com/d/optout.
