I recently upgraded to the Loki release with a fresh install on my Thinkpad S540 without much initial problems. Today I had to use a wired connection for the first time and to much surprise the ethernet port appears to be unable to detect the cable I just plugged in (works perfectly fine in another pc).
First course of action was to check whether the ethernet is recognized at all (I translated the information headers from German to English so there might be some wonky line names):
sascha@sascha-ThinkPad:~$ sudo lshw -c network -sanitize *-network Description: Ethernet interface Product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller Manufacturer: Realtek Semiconductor Co., Ltd. Physical ID: 0 Bus-Informationen: pci@0000:03:00.0 Logical Name: enp3s0 Version: 10 Serialnumber: [REMOVED] //No edit from my side here Size: 10Mbit/s Capacity: 1Gbit/s Width: 64 bits Tact: 33MHz Abilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation Konfiguration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168g-3_0.0.1 04/23/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s Ressourcen: irq:43 ioport:4000(Größe=256) memory:f0704000-f0704fff memory:f0700000-f0703fff
Next step I tried was going to the network settings, tried getting into the advanced settings for the ethernet connection and was greeted with the following:
No connection with the UUID »« could be found
After googleing a bit and learning what an UUID is I came to the conclusion it should be assigned by the network manager (correct me if I'm wrong), so I tried purging and reinstalling the network manager however this did not solve the problem.
So this is the point where I am at at the moment and my google foo doesn't seem to get me any further. I hope some of you can help me out on this one and please let me know if you need more info.