GNOME Bugzilla – Bug 792506
Gnome 3.26.2 Wired Ethernet Permanently Cable Unplugged Status
Last modified: 2018-01-15 12:07:27 UTC
Hi everyone, my current system is Ubuntu 17.10 64-bit, using GNOME 3.26.2 The issue started after migrating to Gnome in which, the wired Ethernet cable was never detected. I tested several cables that work with other computers and nothing. I tested with 3 different routers and nothing. I checked the configuration for interfaces, network manager, etc.. even the driver and it simply stays as "Cable Unplugged". You can see the whole issue here https://askubuntu.com/questions/995660/enp0s31f6-cable-unplugged But the point is, no matter what I try to connect to the wired connection, it never gets detected. My wired card is an Intel Ethernet Connection (2) I219-V which is named enp0s31f6 Thank you for all of the hard work making GNOME possible and let me know what is needed of me to provide better information. Think positive guys!
Hi, was this reported to the issue tracker of your distribution?
Hi Andre, yes sir, I reported it in here https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1725865 Sebastien mentioned to reported here if I understood correctly but please correct me if anything is wrong. Thank you Andre.
what does ip link and nmcli device give in that situation? If I understand correctly, at https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1725865 you post: 2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether 34:97:f6:36:cb:d6 brd ff:ff:ff:ff:ff:ff which indicates that kernel thinks there is NO-CARRIER. In that case, it's neither a GUI nor a NetworkManager issue, but driver or hardware.
Hi Thomas, thank you for the help, here is their output: cyrex@cyrex:~$ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000 link/ether 34:97:f6:36:cb:d6 brd ff:ff:ff:ff:ff:ff 3: wlp9s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000 link/ether 30:52:cb:45:53:ff brd ff:ff:ff:ff:ff:ff cyrex@cyrex:~$ nmcli device DEVICE TYPE STATE CONNECTION wlp9s0 wifi connected Linux enp0s31f6 ethernet unavailable -- lo loopback unmanaged -- cyrex@cyrex:~$
Thanks. "NO-CARRIER" shows, that it's not a NetworkManager bug (neither daemon not GUI). It's also unlikely, that this is related to the switch to Gnome. Kernel indicates that the interface has no carrier. The carrier-state is not determined by NM, but picked up to whatever kernel reports. It's either a driver or hardware issue. Maybe also some wrong ethtool configuration, I don't know. The answer on https://askubuntu.com/questions/995660/enp0s31f6-cable-unplugged seems helpful to me. Look at the output of dmesg whether something interesting is reported. Closing.