It started happening since the recent update of Network Manager. It simply loses the connection suddenly.
It happens very often. At least once per modem reset.
Steps to Reproduce:
1. Turn on DSL-562T
2. Turn on PC
Ethernet connection established, but after a while NM disconnects.
Created attachment 425478 [details]
I think this is it.
Looks like the router isn't allowing the machine to renew the DHCP lease it currently has. There's another bug open about allowing the DHCP client to attempt to get a new lease before we blow the connection away.
*** This bug has been marked as a duplicate of bug 590874 ***