Workaround over here. I don't know why, but the device just doesn't get named eth(x), it gets named "p1p1" or similar, and doesn't get automatically entered into /etc/network/interfaces.
I did lshw -c network on a new Trusty x64 Server install on my Gazelle Pro p9 laptop, and it showed the JMC250 as disabled, but with logical name "p1p1". Did ifconfig p1p1 up ; dhclient p1p1 and connected to my network and got an address immediately. Added p1p1 to my /etc/network/interfaces, and I'm off to the races - just with a funny network adapter device name. ** This bug is no longer a duplicate of bug 880316 Ubuntu installer can't setup network on Shuttle XS35GTV2 -- 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