I have a Fujitsu Laptop E751 vPro. According to lspci the network adapter is: 00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04) The kernel uses e1000e as the kernel driver. When I boot my latop with kernel 3.8.7 and a network cable plugged in, the Adaper is down. 'Ip addr show' says: 4: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 5c:9a:d8:e7:c1:c8 brd ff:ff:ff:ff:ff:ff I googled around a bit and found that e1000e had some bugs in the past, but all should be fixed now. Issuing 'echo on > /sys/bus/pci/devices/0000\:00\:19.0/power/control' on a shell gets the adapter up and working without problems. All other mentioned things do not work. Unplugging and replugging, sending system to standby and waking it again a.s.o.
I am experiencing a similar bug on my lenovo x230. (I did since 3.8.3, and in 3.8.6 -- from kernel.org) It happen *after* resuming *and* when AC is not plugged in. Plugging the AC in or performing the line 'echo on > /sys/bus/pci/devices/0000\:00\:19.0/power/control' resume to nominal performance.
It is most probably related to bug 56611: https://bugzilla.kernel.org/show_bug.cgi?id=56611
This bug is corrected in kernel 3.9.0 (Maybe earlier)
For me its corrected with 3.9.0