I had the same issue after the 15.04 update (3.19.0-21-generic). There is a workaround: In Network manager, set the ethernet connection's MTU value from automatic to 8192. This worked fine for me (from https://bugzilla.kernel.org/show_bug.cgi?id=70761).
HTH ** Bug watch added: Linux Kernel Bug Tracker #70761 http://bugzilla.kernel.org/show_bug.cgi?id=70761 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1458208 Title: AR8161 ethernet stopped working after upgrade from 3.19.0-16 to 3.19.0-18 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1458208/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
