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BingBong
Asked: 2020-03-20 14:38:37 +0800 CST

Ethernet internet cuts out - toggling it off and on fixes it 18.04

  • 772

Ubuntu 18.04

Realtek Ethernet Controller

lspci output here

My internet connection via Ethernet will occasionally (few times a week, using it about 10 hours a week) just quit working. There is no indicator that there is an issue (like in the system tray) other than nothing will load.

Toggling the Ethernet connection off and back on, fixes the issue.

Not sure what other data or logs to provide. Please let me know what would help and I'll provide it. Thanks!

EDIT:

output of sudo lshw -C network

  *-network                 
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: enp5s0
       version: 06
       serial: fc:aa:14:e0:d8:71
       size: 100Mbit/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 duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=192.168.2.202 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:16 ioport:b000(size=256) memory:fe500000-fe500fff memory:d0900000-d0903fff
  *-network DISABLED
       description: Wireless interface
       product: BCM4360 802.11ac Wireless Network Adapter
       vendor: Broadcom Inc. and subsidiaries
       physical id: 0
       bus info: pci@0000:06:00.0
       logical name: wlp6s0
       version: 03
       serial: ec:08:6b:d9:ea:cf
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) latency=0 multicast=yes wireless=IEEE 802.11
       resources: irq:19 memory:fe400000-fe407fff memory:fe200000-fe3fffff
  *-network:0
       description: Ethernet interface
       physical id: 1
       logical name: virbr0
       serial: 52:54:00:25:8e:9f
       capabilities: ethernet physical
       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=192.168.122.1 link=no multicast=yes
  *-network:1 DISABLED
       description: Ethernet interface
       physical id: 2
       logical name: virbr0-nic
       serial: 52:54:00:25:8e:9f
       size: 10Mbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full link=no multicast=yes port=twisted pair speed=10Mbit/s

output of dkms status

bcmwl, 6.30.223.271+bdcom, 5.3.0-40-generic, x86_64: installed
bcmwl, 6.30.223.271+bdcom, 5.3.0-42-generic, x86_64: installed
hid-xpadneo, 0.6.0, 5.3.0-40-generic, x86_64: installed
hid-xpadneo, 0.6.0, 5.3.0-42-generic, x86_64: installed
realtek internet ethernet

2 Answers

  1. Best Answer

    cables

    Your sudo lshw -C network indicates two things...

    size: 100Mbit/s
capacity: 1Gbit/s

    Your ethernet has 1Gb capability, but is only running at 100Mb... one tenth speed. This usually means a cable problem. Are you running with cat 5e or cat 6 cables? I could also mean that there are gigabit switches or routers that aren't working properly. Check your cables. Check your network hardware.

    driver=r8169

    The r8169 driver is kind of flakey. Replace it with the r8168 driver, like so...

    sudo apt-get update # update the software database

    sudo apt-get install dkms r8168-dkms # install the new driver

    reboot # reboot the computer

    Update #1:

    There's a TP-Link powerline adapter pair that connects the computer to the router/modem.

    Install the TP-Link Powerline Utility from the install CD, or download a fresh copy from https://www.tp-link.com.

    Download the latest firmware for your PL adapters from https://www.tp-link.com.

    Upgrade your TP-Link PL adapter firmware using instructions from https://www.tp-link.com/us/support/faq/405/

    Update #2:

    No US firmware updates are available for the TP-Link powerline set.

    Update #3:

    Temporarily removed the PowerLine adapters and ran an ethernet cable directly from the computer to the router. It seems to be working fine now. Suspect PL problem.

    • 1

  2. I had the same issue with different computers (a Desktop and a Notebook), different PowerLine Ethernet adapters (Netgear and Denovo), different Ethernet Cards (RealTeck and ASIX Electronics), different cables (new cables) and different rooms (the same house).

    The unique equal variable is Ubuntu 18.04.

    I have more of the same PowerLine adapters connected to other devices (PS4, WiFI Router and a Win PC) and all works fine (I'm currently using 4 Denovo duo 550 CPL adapters).

    I'm currently solving my issue with the following solution: https://askubuntu.com/a/1228073/1060836n can you take a look?

    • 0