I found a posting at TIs webbord regarding this problem. There a guy from TI described this as a bug in used PHY. Since the RESET-input of that PHY is not connected to a (switchable) output pin on the BBB, only power of/on helps to workaround this problem. With such a connection a software workaround would have been possible where the PHY is resetted by Ethernet-driver until it reacts as expected.
Am Montag, 18. August 2014 14:42:14 UTC+2 schrieb BB-RevC: > > Good day, > > I have several *Beaglebone Black Rev C*. They are connected to my LAN by > using a static IP address. I observed that from time to time connecting to > the Beaglebone Black via ethernet is not possible. > > *I identified the following behavior:* > > The ethernet port has two LEDs, a Green one and an Orange/Yellow one. If I > apply power to the Beaglebone Black I noticed that the green LED > immediately starts to blink. However, the yellow LED stays very often dark. > *It > simply never blinks during the whole boot process of the board*. In this > case ethernet will not be available after booting linux and the board can > not be reached via ethernet. > > *My workaround:* > > > <https://lh4.googleusercontent.com/-ccszPy8rMis/U_Hz2KG6ngI/AAAAAAAAACM/mfEH9GBYDzE/s1600/bb_ethernet.png> > > > > > Is this a known respectively a bug? I observed this with several > Beaglebone Black Rev-C from Element 14. I also have 2 Rev-B boards and I > think (currently not 100% sure since these boards are not used at the > moment) that I observed the same behavior. > -- 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.
