I faced with the same problem on Ubuntu 14.04/Laptop ASUS X52JU/Router ASUS RT-AC68U. Laptop has the same ethernet controller. Workaround with setting up of the speed to 100 is working for me too.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1310798 Title: JMicron JMC250 ethernet: networking always disconnected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1310798/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
