Cable network does not get recognized anymore, wifi works

[lotuspsychje]

ubuntu 16.04 LTS cable does not connect anymore, wifi working

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.6-0ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.13.0-39.44~16.04.1-generic 4.13.16
Uname: Linux 4.13.0-39-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.16
Architecture: amd64
CurrentDesktop: Unity
Date: Sat May 5 19:27:18 2018
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2017-09-30 (217 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
IpRoute:
 default via 192.168.1.1 dev wlp3s0 proto static metric 600
 169.254.0.0/16 dev wlp3s0 scope link metric 1000
 192.168.1.0/24 dev wlp3s0 proto kernel scope link src 192.168.1.2 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 wlp3s0 wifi connected /org/freedesktop/NetworkManager/Devices/1 WiFi-2.4-3569 7103236e-31c4-43d6-871d-14f3cda4b657 /org/freedesktop/NetworkManager/ActiveConnection/1
 enp2s0f1 ethernet disconnected /org/freedesktop/NetworkManager/Devices/2 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.2.6 connected started full enabled enabled enabled enabled enabled

[lotuspsychje (lotuspsychje)]

*-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0.1
       bus info: pci@0000:02:00.1
       logical name: enp2s0f1
       version: 12
       serial: 80:fa:5b:3e:45:e2
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
       resources: irq:124 ioport:e000(size=256) memory:df114000-df114fff memory:df110000-df113fff
  *-network
       description: Wireless interface
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlp3s0
       version: 78
       serial: 00:28:f8:81:66:ef
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.13.0-39-generic firmware=31.560484.0 ip=192.168.1.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:127 memory:df000000-df001fff
maj@maj-N750BU:~$

[lotuspsychje (lotuspsychje)]

The network card worked at fist xenial setup by the way, few months later an update
made network card unusable

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Grzegorz Pawełczyk (gph752)]

I think I have the same issue on my nettop using "Pegatron RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller". It doesn't work out of the box on neither Ubuntu Server (bionic) nor Arch, but I used to run Ubuntu Server on this hardware around a year ago without any problems.

Someone else downgraded their kernel from 4.15 to 4.14 on Arch to solve this issue after updating, with identical hardware.

I'm linking some pastes that were requested in the IRC channel.
modinfo r8168 (I tried to fix things by installing r8168-dkms) > paste.ubuntu.com/p/2spYWX5t4k/
modinfo r8169 (I was asked to unload r8168 and load r1869) > https://paste.ubuntu.com/p/jg9rbKThWZ/
dhclient -v (it also takes 5 minutes to boot, until it times out) &> https://paste.ubuntu.com/p/D3JpycKrq3/

[Kai-Heng Feng (kaihengfeng)]

Same as LP: #1779817?

[lotuspsychje (lotuspsychje)]

@6 for me its not related to suspend..it just has stopped working all the time, even after reboots
so not related your bug?

[Erik Mason (pikhyle)]

After a fresh install of 18.04 Bionic, my USB wireless adapter didn't show up. Running 'lsusb' provided the device ID for the adapter as 0bda:a811 Realtek Semiconductor Corp. Cross-referencing that ID with 'Ubuntu 18.04' I eventually fell down the rabbit hole at askubuntu.com and landed here: https://askubuntu.com/questions/970283/ubuntu-17-10-drivers-not-found-working-properly

This page has instructions on cloning this git repo: git clone https://github.com/gnab/rtl8812au.git
After a 'make make install' and a reboot, wireless networks show up and internet connectivity is restored.

Hope this helps anyone with a similar device ID

[lotuspsychje (lotuspsychje)]

 FIX Updates 16.04.5 @ 16/8/18 made the realtek chipset work again kernel 4.15