This intermittent problem appears to be common to both the Beaglebone and BBB. I have observed it on at least ten units of the Beaglebone and now on my first BBB.
Ethernet refuses to connect. I have tried restarting connman.service and software rebooting, neither fix the problem. The only way I can get out of this is by either cycling power or hitting the reset. I have tried multiple cables/routers, but the symptom keeps reoccurring. This problem only rarely happens, but as SD "file-systems" do not appear to take kindly to undisciplined shutdowns, I would prefer a more elegant solution. Any suggestions?
Best regards,
Dave.