In 12.04 this problem was fixable by downloading and compiling the JME drivers (jmebp-1.0.8.5.tar.bz) from the JMicron web site.
However on 14.04 compiling the driver fails; it seems like there was an API change in a newer version of the kernel. Consequently I can't get ethernet working at all for my JMC250 Ethernet card on 14.04.
In 12.04 this problem was fixable by downloading and compiling the JME drivers (jmebp- 1.0.8.5. tar.bz) from the JMicron web site.
However on 14.04 compiling the driver fails; it seems like there was an API change in a newer version of the kernel. Consequently I can't get ethernet working at all for my JMC250 Ethernet card on 14.04.